HODL by storing in a cold wallet.
if only detained to be kept, then the bitcoin will not be developed.
I agree, if most people will just store it and wait for years to sell it then bitcoin will stop to circulate and will slowly die. Bitcoin was not created just for holding it. It is not a tree where you plant and wait for many years to reap its fruit.
I love gambling, so I will do arbitrage gambling with this amount. It gives slow profit but at the same time there is no risk involved.
Maybe you can try to do trading of altcoins with this ? I agree both trading and gambling is not safe for your 10BTC unless we have prior experience.