It won't transfer back to bitcoin. Alts are going to go from strength to strength. Partly because some are innovative. Parly because alts are volatile so offer trading opportunities.
Lots of exchanges even allow you to trade some alts directly for fiat, bypassing bitcoin.
Hey, you mind sharing a few exchanges that allow you to trade alts directly for fiat
I haven't used it yet, but I heard there's a new one called Bisq.