Considering a bitcoin owner of large amount, and he died w/o sharing his user/pw, Are those coins can be considered as deadcoin since those coins will not circulate anymore in the Network?
Yes it is true since the bitcoin or any of the cryptocurrencies that a person hold when he dies will not circulate or go around the world. It is like thee bills and coins in the reality. With hoarding of those currencies, the economy of a territory or country can be affected. It should be exchange or maybe given to anyone so that it can go around the flow of the cryptocurrency and will not affect other people that invest in bitcoin or any of the cryptocurrencies that a dead person hold.