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It's BTC's market cap compared to the total market cap of all other crypto currencies combined. Btc has a 15,500,000,000 market cap right now compared to ~18,000,000,000 market cap of all crypto currencies combined.
As store of value BTC is crypto gold.
LTC silver
I don't see that maybe Monero will be.
The next stage will be coin that are used for something ETH as vessel for payments can be good.
ETH as store of value is BS because of "political" forks with real money you can not turn back time.
Other coin if they will be usefull it will rise in price if not...
Transaction time of BTC? last time when i have send money to steam to buy PC game it took me 30s to pay and get stuff on account.
3 confirmations are not required everywhere.
Block size i think it will be reworked some da.
Alts will get some cash $
inside but in long term just best and REAL useful will survive.