In my opinion, altcoin doesn't get much chance to recover them. Bitcoin does not offer a chance to try to recover altcoins. When altcoins start to recover, then Bitcoin is starting sometimes declining and sometimes prices are rising and altcoins price also start to decline. Thus Altcoins are failing again and again to recover them.
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We are in a Altcoin winter after the craze from 2017 I think it will pass after some more falling after the next bitcoin halving and bitcoin starts skyrocketing again it will be the same old story.
Oh man I missed the boat on bitcoin a 4th time time to buy random altcoins to not miss the boat on randomcoin that does some random new thing!!
Same story with me too. I converted most of my bitcoin holdings to litecoin, waves, stratis and few other altcoins in 2018 and over the last one year, total market value of my investment dropped by 70%. When it comes to holding investment for long period, only bitcoin is viable option.