Psst. You can use Bitcoin for whatever purpose you may see fit. You want to use it as an investment? A payment currency? A way of having real ownership over your money? A way of hiding your wealth from the government? You may even use it to buy those anime waifu pillows or Belle Delphine's bath water and I don't care one bit. Because that's the point! You have complete freedom with Bitcoin, and you don't need to care what people think!
Yes I agree with this, Yes Bitcoin was created with some purpose to be a currency but along with it there are various ways to use it and we all have our own freedom to use it as however we like just like what mk4 has stated.
It is the same as money(Fiat) why do we need to care on how people use their own money when they are the ones who worked for it?
We think too much about it and have so many opinion on it why can't we just let them do what they want.
I think it doesn't matter whether it is crypto(BTC) or physical money (Fiat) people would always judge on how other use it for example,
Someone bought an expensive item even though he/she is just earning minimum wage.(People would create gossip and talk about it even though that person save up his money just to buy it to enjoy it).
So you see it doesn't matter whether it is in crypto or Fiat people would judge others on how they use it.