In the middle of 2015, I first learned about bitcoin.
Wait a moment. Are you sure that you learned about bitcoin in 2015? If yes, Then It took couple of months to learn about trading.
The lowest closing price for Bitcoin (BTC) in 2015 was $178.10, on January 14, 2015.
As you learned about btc in 2015, So Before investing you must took some months to learn it well. And you missed the lowest price. You were looking for loan and later you didn't take it, so I think you invested little money.
I've been a millionaire since 2015, and my uncle is too.
It is unbeliaveable to hear that you became a millionaire in 2015 as you learned about bitcoin in 2015. That time there was no future trading options too. So how can we believe that you became a millionaire on the same year you heard about it when there was not held a big pump in 2015. If you bought btc in the lowest price and sold it in the highest price then you just made a little price which is not a million.
The closing price for Bitcoin (BTC) in 2015 was $430.57, on December 31, 2015.