It's not that it wont get mass adoption, it's that it's not actually designed too.
In the words of Machiavellie, one of the hardest things to preside over, is the new implementation or way of doing things.
Bitcoin is quite literally digital gold, an accurate valuation of the market cap of the hyperinflated fiat currencies of globalist governents and the colonies affected by their massive debt, devaluation, and deregulation tactics.
Bitcoin allows people to be their own banker. But not everyone can be, not everyone has the desire, time or ability to learn these new methodolgies, simple though they may be. The masses don't accept a trend until it's already dominated the niche it inhabits.
It doesn't matter if its mass adopted or not; btc is an accurate metric of the measurement of quantative easing. Trillion dollar deficits and negative interest rates, backed by mere military force, and no gold standard, bitcoin and blockhain development sees the niche and fills it.
That niche is funding projects that secure investments safe from counterfeiting, theft, false scarcity and price gouging.
Bitcoin represents the measurement of fiscal error and insolvency that has come before it, as an idea, ot needs validation from no group of herd minded debt slave automatons.