You can check it from how the money flow is going. normally investors first invest in bitcoins. So the bitcoins will be pump. They will take profits after some time. Then they will invest that most profits into alt coins. so alt coins will be pump. My advice is always take the profits from alt coin in every bull market. Because after some time most of the alt coins will be dead.
thats right, there will be so many altcoins created at the beginning of the bullrun, everyone wanna make their own coins and become rich out of it, but when bullrun is ended or nearing the end, these altcoins are gonna be dead and turns into zero, thats the thing with bullrun.
the veteran holders definitely already figured out this pattern.
investing in some random altcoin only good at initial bullrun, after that its gonna be too much risk and also waste of time.