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?
There is no underlying rule that bitcoins would lose its validity as time goes by. Individuals who have stashed a lot of bitcoins from the beginning could have been sleeping under a bed full of money right now.