i have one question..
in 2011 bitcoins per 50,000 to 500,000 we spent for nothing, just pranking and stuff...
if one person kept 50,000 bitcoins in his account from 2011 up till now,
would the bitcoins still be valid for transactions?
Yes they are always valid Bitcoins regardless of how long you hold them. Someone with 50,000 Bitcoins from years ago would be extremely wealthy right now. I'm sure there are a bunch of millionaires and even a few billionaires from Bitcoin investments. That's why so many of us have jumped on the bandwagon in the last few years. This is an enormous opportunity but the pioneers are the ones that struck it rich. The rest of us are just going to get a piece of the action.