There are two main function of bitcoin as a very prominent decentralized currency and the first is as a payment system and the second as a tradable asset. I'm not going to go into detail about these two main uses of bitcoin as I think you're already aware of them in general.
Will Bitcoin always remain an investment vehicle?
There are several reason why bitcoin may no longer be valuable as an investment asset or tradeable asset in the future in my opinion.
1. Previous currency failure
2. Risk of technical failure
3. Political, and
4. Competition between currencies
From the four point above, you should probably realize that even though bitcoin has grown and survived over the years, we still don't know what the future will be like. But now you seem to realize that bitcoin is able to survive and grow during a pandemic and this can be used as evidence and consideration that bitcoin has the potential to last longer.
Or will it one day be truthfully utilized for day-to-day life like paying for meals?
As a currency, bitcoin still has the potential to be used illegally or legally. As a payment system, I think bitcoin has been adopted in various countries as a mean of payment, but you need to know that not all countries have the same regulation regarding the use of bitcoin as currency. It all depend on the rule and you have to stick to them if you don't want to get into trouble with the law. So far, as an Indonesian citizen, I still can't use bitcoin as a legal mean of payment due to regulation, but I can trade it in commodity markets that have been approved by the government.