The early dividend period of Bitcoin is over, and the next is the stable period. What are your views on the future? I clearly know that the persistence of beliefs is often not so strong, and few people can hold Bitcoin for a long time.
I strongly disagree with this very statement of yours, as we all know Bitcoin was never created to be stable, and can never be irrespective of the huge effects on the market, as there is nothing new which Bitcoin hasn't gone through before came out successfully consecutive. But in as much as we are facing bear market now, it's never permanent, as it is an opportunity to acquire more Bitcoin if you can, as bull run is for sure for only those who could afford to hold it for long.
I agree with your opinion that Bitcoin has never been stable since it was launched back in 2009 but I think it will be stable when it will be adapted by masses & its marketcap will reach to reasonable level (around 10 trillion) then it won't be easy for whales to manipulate the market and create FUD or FOMO.
As far as alts coins are concerned, the good ones will survive, and bad ones will be killed by the market.