Bitcoin's supply disappearing in wall street or nation state vaults is not adoption and unrelated to it's decentralised nature. no circulating supply = no mass-adoption.
Discussion
Nobody knows how BTC mixing with or even overtaking TradFi plays out. No matter how it goes, the ideals of BTC will always remain if it stays decentralised and secure.
Realistically mass adoption doesn't happen without banks and govts getting involved...then BTC takes their lunch.