FOMO drives prices up, thats obvious. Bitcoin HODLers mostly ignore the noise and just keep stacking. SOL guy panicked, Bitcoin guy probably bought more. End of story.
This is the clear difference between the two traders, the bitcoin investors sees bitcoin as a currency and as an asset that either either it goes up in the future or remains stagnant he has his investment in something that is a strong hedge of inflation and as such over the long run the market no matter what will definitely go back to his entry and possibly move up to some profit. This is the psychology that a bitcoin investor has already set due to bitcoin past trends and no matter what happens you usually do not see them FOMO because it is a psychological thing.
But for altcoin investors, most of them are short term traders and they usually just have this fear already set in about the coin, in fact most altcoins investors do not usually have a profit target and thats why when the market starts pumping they dont even sell and wishes for more profit but when the market immediately starts dumping they fear the worst, this is something that they have as their psychology.
The last time SOL dumped to $90 was back during Terras collapse.
I think OP should have said the $90 region and not specifically $90 because if it is a recent dump yes bitcoin has dumped to $95 in the early months of April when the market was bleeding due to the tariff war