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.
this is true with the sector of technology booming, there is no doubt that the advancement of asset classes especially Bitcoin will rise its value significantly. I am telling this in a long term perspective. However, just be wary that anything can happen in the market. Global factor affects the price of any risky assets in the market, it could be war, inflation, or another pandemic. Bitcoin is very scalable and can be accessed in very convenient way. There is a great challenge in bitcoin, but there is also a great reward.