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.