in 2017-18 HIGH-PROFILE merchants (Microsoft,Steam,Stripe,Expedia) stopped accepting BTC due to fees

Good points!

Many suggest the wealthy will be able to use BTC without concern over fees. I think that is social engineering looking to fool people into thinking they can be part of the elite class of crypto users if they pay the fees. Real wealthy people can afford high fees, but, they are too smart to choose that option without a good reason. The social engineering addresses this with the "BTC is the most secure" argument. Of course, in my view, BTC has already been captured and development centralized, so, has almost no security left at all. Even for people who do not buy my 'BTC has become centralized' argument and think Hash Rate is what makes for security, BTC is only on top for now. Because it can't scale for massive worldwide adoption, I believe a real "Bitcoin" like BCH (if it develops the ability to scale and become peer-to-peer electronic cash for the world's people) will be able to "go viral" and skyrocket in price by attracting massive waves of new users (and BTC will not be able to do that). Since mining hash power follows coin price rather closely, according to my theory, the bitcoins that can scale will be the most secure in the future.

Fees are unpredictable, it's to expensive to use BTC , store it ? Maybe, use it to buy ? Nope, change take time this is the nature of people.