It is proven and tested that Bitcoin is a good investment in the long-term and that cannot be denied, and Bitcoin has many features that other cryptocurrencies do not have, even if it is used as a payment option online it is a big deal how much more even with the opportunity it gives to people. In addition to this it also provides savings in the future, so the scalability that you are talking about is only a low percentage of the problem that a bitcoin holders will face honestly in my opinion.
I think the number of Bitcoin usage is increasing day by day. Through Bitcoin we can now do almost all the different things starting from payment. Bitcoin usage is increasing day by day. It seems that at some point all people will use Bitcoin. .But it will take a few more years. Everything is getting smarter as the days go by.
I agree, bitcoin will be used a lot more in the future even still, which means that we need to handle all of this transaction fee situation before we get there. I have no idea how that will be done, better minds than me are on the subject working on finding a solution to it, but I can testify that we have been late already and need to come up with something.
If we want to have more people in the bitcoin world, that requires us to have something that will make it more expensive to trade and move money around. People could do that for free in the fiat world for most cases, why would they want to prefer something that would cost them 10+ dollars to do when they can do it for free in fiat? In order to grow, we need to figure that part out.