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, i do not think bitcoin has validity period. So, if he can still access to his wallet then he can sell his coins or for whatsoever purpose it will be. But if he cannot access to his wallet, then his bitcoin will just sleep in there.