<p>Unlikely, but you can find out easy enough whether it’s real: create a wallet on your own phone (e.g. bluewallet.io for Android or Blockstream Green for iOS) and try to send 1 ₿ from your SIL’s phone to your new wallet. If you receive the 1 ₿, congratulate your SIL to an early retirement:<br />
250,000 bitcoins are currently worth $17,500,000,000, i.e. seventeen-and-a-half billion USD.</p>
<p>However, I would be surprised if someone were to own 1/80th of all bitcoins in existence without knowing whether they have any bitcoins at all. I suspect that the app or website you are looking at is either a watch-only wallet that follows some exchange’s wallet, or outright malware that is showing you bogus. Either way, the most likely explanation is that what you are seeing is the outcome of someone trying to scam your SIL, likely to extract an <a href="https://bitcoin.stackexchange.com/q/103891/5406">advance fee</a>.</p>

CC BY-SA 4.0
2024-03-08T20:11:25.100Z
2024-03-08T20:11:25.100Z
Murch
<p>My sister in law believes she has bitcoin, I think she may have something also but do not know for sure, <a href="https://i.sstatic.net/XIOlh.jpg" rel="nofollow noreferrer"><img src="https://i.sstatic.net/XIOlh.jpg" alt="enter image description here" /></a></p>

CC BY-SA 4.0
2024-03-06T00:06:12.217Z
Does this answer your question? [Is there some way to safely prove that you control a certain number of Bitcoin?](https://bitcoin.stackexchange.com/questions/93870/is-there-some-way-to-safely-prove-that-you-control-a-certain-number-of-bitcoin)
RedGrittyBrick
CC BY-SA 4.0
2024-03-06T03:05:11.383Z
Frankly, I have sincere doubts that you would have 250,000 bitcoins without knowing for sure.
Murch
<electrum>
Bitcoin, is this for real or not?
Norm Sibley
# Bitcoin, is this for real or not?

(Asked by: username_0 on 2024-03-05)

My sister in law believes she has bitcoin, I think she may have something also but do not know for sure, [![enter image description here](https://i.sstatic.net/XIOlh.jpg)](https://i.sstatic.net/XIOlh.jpg)

**Tags:** electrum

> **Comments:**
> **username_1**: Does this answer your question? [Is there some way to safely prove that you control a certain number of Bitcoin?](https://bitcoin.stackexchange.com/questions/93870/is-there-some-way-to-safely-prove-that-you-control-a-certain-number-of-bitcoin)  
> **username_2**: Frankly, I have sincere doubts that you would have 250,000 bitcoins without knowing for sure.  

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## 1 answers

### Answer by username_2 on 2024-03-08. Score: 1

Unlikely, but you can find out easy enough whether it’s real: create a wallet on your own phone (e.g. bluewallet.io for Android or Blockstream Green for iOS) and try to send 1 ₿ from your SIL’s phone to your new wallet. If you receive the 1 ₿, congratulate your SIL to an early retirement:  
250,000 bitcoins are currently worth $17,500,000,000, i.e. seventeen-and-a-half billion USD.

However, I would be surprised if someone were to own 1/80th of all bitcoins in existence without knowing whether they have any bitcoins at all. I suspect that the app or website you are looking at is either a watch-only wallet that follows some exchange’s wallet, or outright malware that is showing you bogus. Either way, the most likely explanation is that what you are seeing is the outcome of someone trying to scam your SIL, likely to extract an [advance fee](https://bitcoin.stackexchange.com/q/103891/5406).


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