In my opinion, The new All-time high that Bitcoin is targeting right now because of the bull run, I think it will truly create a mass of people rooting with bitcoin they will surely be mesmerized by Bitcoin's Dominance and other people that go out to bitcoin will come back again because they will feel the need on getting on board again,
Technology has progressed, people studied and has understood better how cryptos work, so they came to the right conclusion shitcoins are indeed...shitcoins. Shitcoins value proposition has since faced and now they are clearly revealed for what they have always been: (kind of elaborate) exit scams by fraudster to transfer your bitcoin in their wallets.
And base on this theory people that are getting back on board have already gained knowledge about Bitcoin And knowing its true purpose and already understand that Altcoin that is stable coins are only a nuisance to the market of crypto that is why fewer people are prioritizing it.
Libra is coming to the market, this half fit, half cryptocurrency coin will be a huge success because it is going to be incredibly successfully where many other projects, bitcoin included, have dramatically failed: adoption. Bitcoin will survive this, of course, but shitcoin basing their value propositions on micropayments (read BCH and minor forks) are facing doomsday.
I don't really think that Libra will become that successful in my opinion, Maybe it can become popular and regulated because of the popularity of Facebook and we can truly say that social media is a real source of a publicity stunt to the masses and some ICO back then are using these to advertise their projects It can sure gain popularity but not entirely have some kind of price increased that much.