A majority of alts are worth near nothing at the moment and could end up crushing even more coins out of commission. The alt coins have for sure shrunk but we do have litecoin halving and litecoin sponsoring coming up here just after the halving takes place.

If there is an altcoin rally its going to be centralized to a few alts and not all over the place like we saw in 2017.

If your going to be in cryptos then bitcoin is your "safest" best I believe.