this is one of those questions that can be answered by another question, let's suppose the person had $1000, and took that $1000 and bought bitcoin, when that person bought bitcoin with his $1000 the price was $10,000. Months later this person sees the bitcoin price being at $30,000. this person will be very profitable... will this person take some of his bitcoin to buy a coffee and if this person can pay with fiat that does not increase over the long term? I very much doubt that this person will take your bitcoin to buy coffee. But at the same time we can have a scenario where the person is a miner, so that person will have no problem taking some of their bitcoin to buy coffee