Bitcoin has always been the leading currency on the market irrespective of how much a coin may surge. Bitcoin was able to capitalize the market during its early stages before the creation of other coins hence it has got lot of user-base and its community is also strong and supportive which is one of the main factors required for the survival of a coin on the market.
Indeed, even with the drastic changes and events happened in the market Bitcoin still emerged as a high value asset that has gained the trust of many users, investors and traders. I believe, the potential of Bitcoin to survive the market is huge and will always lead as the best currency in the future.
It will remain as investing tool as long as it has no real usage.
I can't buy anything with it "irl" - in 7/11 or something similar to it.
If it will have its usability - bitcoin will be unstoppable then
You can literally buy anything using bitcoin online, lot of online shopping website is accepting bitcoin, and majority of country are accepting bitcoin or it is legal on them. If you think that bitcoin has no usability, I think you are just new to bitcoin, read more and you will realize that bitcoin has a lot of usability, it's not just an investing tool.
Most people see bitcoin as a mere way to get rich apparently. Not knowing what is the real reason it was created in the first place. As of now, more and more establishments, businesses, and entities adopt payment through bitcoins. Which despite the high charges to compensate for bitcoin's volatility, is still a good step towards becoming a bonafide currency that everyone can use. So do your research, you should be able to see it.
It makes me cringed when someone says that they adopt bitcoin because they want to be rich. That is the misconception that we should change, most of the people see it as investment and do not know what it is really. They are just speculating without prior knowledge about it. We should see it as a new technology where we can use it to improve the current poor payment system.