Bitcoin is about to take-off, there's a huge probability of it right now, it has broken the downtrend, once it does, proud owners of alts are gonna cry, again.
I am a proud owner of alts.
Bitcoin is like the Eiffel Tower - if you took away the buttressing it would fall down. ALts are the buttressing for bitcoin and if they disappeared bitcoin would fall down because difersification is an essential hedging aspect of any investment portfolio.
Also, although bitcoin is fine as an asset, it's technologically crippled and so alts are here to stay
