Wait a moment,
You did investment in that broker 5K and your total profit is 5.1BTC?
It is too much, mate and it is very strange to gain that many profits in a short time. Moreover, it seems nonsense when someone will really give you those big profits like that.
In this case, I searched about the broker
https://www.mitracrypto.com/,
and I found this:
https://www.scamwatcher.org/mitracrypto-review/The result on that website shows that Mitracrypto is a scam. However, I can't find the other sources.
...
You have to activate and recycle the profits in your wallet using your
private key with 2.08BTC which will be sent to your personal and secure
blockchain wallet.
It seems so strange, for what they are asking for this? If it is already in blcokcahin.com, so you need to do withdrawal the whole profits from that blockchain platform. But it is not that the fact. You should do that to get 2.08BTC, so where are the least?
In this case, be careful with all members here, scammers are everywhere with their new and smart ways to ensure the victim to be scammed.
Edited:
Thanks, @Bitcoin_Arena for remaining, a scammer is always a scammer, and we don't need to expect to receive our money again.
Just make it as a lesson to be more and more careful.