earning 2 BTC from a 1 BTC investment is nothing strange.
he said he earned it by gambling and trading.
with gambling, it is not possible to profit from an investment, you only have a "SMALL CHANCE" to win and you lose most of the time.
but with trading it is possible and many are doing it, but to do it after a friend tells you and you start and gain that much profit in your first try, this is BS.
I traded my own way. I didn't do it after a friend tells me but I developed it on paper and then I have it automated and have helped a friend set up the automation as well as he wanted some beer money.
Nwo it's just slowly scaling up. I can dump a ton of money in but I would better use money I made from this instead.