Quite simple, many expecting an explosive entropy of the bitcoin adoption / price but truth is the average folk most common needs and use of money aren't met by bitcoin, this fact goes against the very foundation of any successfully implemented mean of money anytime across recorded history. It really is a political problem at it's core, the deep states run by bankers won't let a viable alternative co-exist in the streets. I have no doubt that with truly liberal and free alien civilizations, the blockchain technology would have attained (for all purposes) universal adoption in a shorter time that the cryptos have been around by now here.
What are your takes about that sentiment?
Using it for purchases is the final phase of hard money adoption. First Bitcoin was a tech experiment, then it was a risky get rich quick scheme, then it was the best investment on the planet, now its between its investment phase and savings phase. Once people have been saving in Bitcoin for a good number of years then they'll feel comfortable spending it. Right now its still too early in adoption to spend for most people because why spend something that is gonna go up 5x in the next couple years.
2030s and 2040s is when we'll see the transition to starting to actually spend it. So in the meantime we have time for those point of sales to get built on and adopted. By that time Bitcoin volatility will be much lower, hundreds of millions of people will have saved/grown a lot of money with Bitcoin, and they'll be ready to start spending. Afterall the whole point of savings it to eventually spend it.