Help me out with this simple problem.
1 BTC in early September = 4000$ approximately.
1 BTC today = 15500$ approximately.
Lets say that you invested 1BTC in Bankera back in September.
1 BTC in early September = 2000000 BNK
2000000 BNK today = how many $

?
Wouldn't be better if you just hold your precious BTC?
BNK = 1 Euro cent. Don't compare it with BTC. It's up to the decision of the investor to choose which currency to pay with, either FIAT or crypto.