We need merchant adoption so we don't have to sell our BTC for Fiat anymore to buy stuff.

The circle will be completed, volatility will slowly stabilize and fiat will become more and more irrelevant.Otherwise BTC will remain a speculative asset for fiat gains and fiat will stay dominant.Without merchant adoption, Bitcoin might be a store of value / hedge against inflation at most, but i'm starting to doubt that too because in the end we will have to sell for fiat to buy stuff.

TLDR: If you want BTC to stay relevant in the future, start using it as a currency what it was designed for according to the whitepaper; A peer-to-peer currency.If you don't like spending your Bitcoin, then stick with fiat. But don't complain about it!