This question shall be answered by the analysis of some data from the application coin-doubler.

How does coin-doubler work

This application generates profits in the cryptoscene by using the most advanced technology and everybody can benefit from it by "donations". Donations to coin-doubler are rewarded with twice the amount in the same token over an unspecified period of time, also as a gift.

Evaluation of a randomly selected donation

The user latest-marble has donated 100.000 STEEM to coin-doubler with this transaction 876fb5a89fd8edc5924d03528bd0f623c3425568 on 05/22/2025 UTC.

List of the gifts

The table below lists the corresponding gifts which the user latest-marble has received from coin-doubler.

#	Date	Gift	TX
1	05/23/2025	3.746 STEEM	67c1b566907290fc9ec821a75d601ed838a4b8fe
2	05/24/2025	3.382 STEEM	b9ad69e319db8742a2e3791b34fbcd1ceb3f3973
3	05/25/2025	3.905 STEEM	bfde18810078e0fd5f1155368a0a91565aa3307a
4	05/26/2025	3.520 STEEM	080fca35aab9df1e296a36d6ebebc2113aa909ff
5	05/27/2025	3.196 STEEM	7e92761ae9b274704b776cbd4fe85a923e4f89eb
6	05/28/2025	3.012 STEEM	77d773058b04ba6d05825bb9fe356e5c2ff6926c
7	05/29/2025	3.235 STEEM	f5021770be31c74c3aedd5aa1b0e647fd9b8fac5
8	05/30/2025	3.158 STEEM	fd2d5cb4f68925ac456c43c3aebb9565c4a6fbc1
9	05/31/2025	3.520 STEEM	84c2470056cbaee620472f3da600ba2baaef7c69
10	06/01/2025	3.620 STEEM	71f94ccfdb237fb9fe731a25cf803caa16a72a87
11	06/02/2025	3.458 STEEM	14aec997c288660d7e6877121bc8391c93c45fc7
12	06/03/2025	3.499 STEEM	99e75045f356ff01f41238b302df1dd981073aa0
13	06/04/2025	3.270 STEEM	801f7b6d52e686b0c26c09ffeaf01e1c03965501
14	06/05/2025	3.781 STEEM	36f7c105c053fd9ed74d77be8aa9a837a5bd9f5e
15	06/06/2025	3.208 STEEM	69aa0a0684468df29967b629a8f7a9d2e991e89d
16	06/07/2025	3.866 STEEM	0f801ac6eb90dae717af9727cae25de2b19a5eaf
17	06/08/2025	3.812 STEEM	f19c30c8278d0b20948f104632bea6fedc2d8baf
18	06/09/2025	3.374 STEEM	d0052bd258078e56015870c1774c33487751c8b2
19	06/10/2025	3.462 STEEM	8c9c927601e079e4e7b10aa77871899c25294013
20	06/11/2025	3.631 STEEM	d8177e93a1e093bf0a4cd80f4b23e7362b5085c4
21	06/12/2025	3.702 STEEM	ad37b8d1e88b80efcb38f0287138dc25a896d1b2
22	06/13/2025	3.791 STEEM	11e7a930e1ee9489bf1eed388192727078a6f7a6
23	06/14/2025	3.930 STEEM	56e6ebadcf88cf2f2cd486ef1b6c344ada2cf9b7
24	06/15/2025	3.870 STEEM	fae2f5b3ce04e7da8721017bc87fb59e9fc8488b
25	06/16/2025	3.993 STEEM	2e0eccace06a0c784b6258d28a8fbf1ebe77fdc8
26	06/17/2025	3.874 STEEM	51409e33ad95a96d949a2f6b357ae29f53491f41
27	06/18/2025	3.109 STEEM	f333f3ec006e8ce478b1de78528726b326ee2edb
28	06/19/2025	3.445 STEEM	e4feca703cec7d80e1e884e3d367f9f1ee1b032c
29	06/20/2025	3.849 STEEM	f802b0cd3067e5ce25f79fe511f38cafb203cd6f
30	06/21/2025	3.772 STEEM	45faada0de7da755a699a3b2c4f69b698237f9c4
31	06/22/2025	3.188 STEEM	e28d573bc1f357d5f1c575aaa16483365ae10f99
32	06/23/2025	3.607 STEEM	c6f81c8bb2c55e3d5a979185c50ffb443849aa66
33	06/24/2025	3.371 STEEM	12dcb3e372b43885524070c17da6345980bf10bf
34	06/25/2025	3.979 STEEM	1520f91060207b00d1329be97ca1aac03a11bae2
35	06/26/2025	3.036 STEEM	f0d1189452d8ade113eaa493e903f533b6c5b162
36	06/27/2025	3.069 STEEM	27ca545e4d1c24f910c0a3769b5fbad914a84f0a
37	06/28/2025	3.515 STEEM	a674b4b86515da55fd7470c2afacab0ed33447a2
38	06/29/2025	3.153 STEEM	0831fde4a9ba58c2e6d8f77fd7d34ca7dc17c106
39	06/30/2025	3.645 STEEM	2d87ac4dcd1082c0b498c742f61638efe338daf3
40	07/01/2025	3.265 STEEM	7d0eba7a7099621e61b5630a831ea1254f936a29
41	07/02/2025	3.534 STEEM	419fbfe949c27a32714ddea02f0895bd54ab6c76
42	07/03/2025	3.789 STEEM	3325e224385eb45243f63b7cb103bef4cbb6f8e8
43	07/04/2025	3.582 STEEM	c58b37f6a56d4a16390dd83a84446f40fff69de9
44	07/05/2025	3.466 STEEM	6a3de02b87eef1ba7082dcf95d0d1dfd22f20358
45	07/06/2025	3.298 STEEM	5f1a81e32de63ae3a274049713e18586b285595b
46	07/07/2025	3.637 STEEM	8621b9cd200257454d72de872a739e11a08e6871
47	07/08/2025	3.422 STEEM	b62fb7e3cbf6f57812b741661103c3d468a9c979
48	07/09/2025	3.422 STEEM	070576dbb32c9bac03ffbcb2f5a88366eaaa9580
49	07/10/2025	3.596 STEEM	03bbff729d10d72b711c2da0072df5facf3d13dc
50	07/11/2025	3.747 STEEM	1fd80a0815d54af746b5be6a1b4a3fd6b574c7d8
51	07/12/2025	3.710 STEEM	23a19dd30d64dbf76abb9210263c886b688ae17e
52	07/13/2025	3.730 STEEM	82a18f6c2d948b1d4b354737638386421afa4ea6
53	07/14/2025	3.331 STEEM	f4691fbe0e471964b031b33ab0cc2d1588445044
54	07/15/2025	3.602 STEEM	3560ec8771eccfd89a1f05172bdf436996ad1a1d
55	07/16/2025	3.739 STEEM	cc120585e6eb3a71e96e64d5cedd83bf9845781a
56	07/17/2025	3.324 STEEM	f6448b6e99efb15eae29660697918b5623a0db02
57	07/18/2025	2.253 STEEM	820d7cb77442c5977bcc938afe97ac685509aa5e

Total: 200.000 STEEM

Summary

The user latest-marble has been rewarded with twice the amount of the "donation" within 57 days.

Technical Analysis for STEEM

As the application coin-doubler has the potential to attract numerous investors, STEEM's price is expected to rise.

Technical Analysis for STEEM crypto currency

Boost My Wealth Challenge

If you want to participate from the Steem ecosystem's success, you can do so right now by following a few simple steps.

All author reward from this account will be paid out for an indefinite period of time to 8 participants per comment as Beneficiary Reward.

You are the one who determines your success through your activities and your persistence!

Each of the following steps are evaluated, but aren't mandatory:

If you don't have an account yet, create one for free at Steemit, Inc.
Follow me.
Copy this link https://steemit.com/@abandi and invite your friends to the Steem Community via it on the social networks you use. Below is a template:
If you have been wondering where I have been spending most of my time lately, I'm studying the many opportunities to achieve my Financial Prosperity presented by https://steemit.com/@abandi, and I'm working through the given steps.
Share this post on the social networks you use.
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Upvote this post.
Comment at least once a week on this blog about your activities outside the Steem ecosystem that are related to the Steem.
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Type in abandi and click "SET PROXY". Currently this account is voting for the following witnesses as they are the ones who can ensure the safe operation of the Steem blockchain: beargame, cryptoking777, dev.supporters, dlike, enjoylondon, exnihilo.witness, future.witness, hinomaru-jp, hoasen, inwi, juddsmith079, justyy, leverfile, maiyude, matreshka, menacamel, parse, protoss20, rlawlstn123, rnt1, roadofrich, roundblocknew, smt-wherein, steem-agora, steem-dragon, steem-supporter, steem.history, upeross and upvu.witness.
Invest for your bright future by buying some STEEM regularly and only selling some of the profit if necessary. (Think about the power of compound interest.)
Find an exciting post outside your circle of friends on Steem and comment, upvote, etc. it.
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Head to the steemitblog to get to know other interesting activities within the Steem ecosystem, which can bring you additional rewards from the steemcurator01's upvotes.

Beneficiaries of this post

Following users will receive 12.5% from the Author Reward each: hokova.tagai, kepew.tiptag, lobalo.tagai, mefasem.tagai, soneg.tagai, tolevor.tagai, voke.tagai and xoloxac.tagai.

Information for beneficiaries, your Upvote on this post will earn you an additional 12.5% Beneficiary Reward to your Curation Reward.

Users on the radar for upcoming Beneficiary Rewards

Following users have also appeared on the radar: aparti1di.tagai, aunthalf10.tagai, aunthalf9.tagai, baby1arke.tagai, dalipsingh1536, dataentryexpert, deepak2001, fitprince, fomon.tagai, ivy666, kenode.tagai, robin216, techcrisisin, titanxexchanges and verelarjek.

The decision has been difficult as always, but maybe it will work out in the next rounds. You get mentioned so that you at least get the attention of the followers. You have contributed to the Steem ecosystem's success as well, thank you.