It would generally be appropriate to say things like "was the best return" or "has been the best return" when describing past price appreciation. "Is the best return" could be reserved for something like a stable source of income.
Many people earn income in bitcoin or cryptocurrency and would consider the US dollar the poor investment or purchase.
It is all a matter of perspective which simple wasn't apparent because there weren't options a decade ago.
...for some definitions of "many"
Literally dozens.
thats probably true, the philosophy has been there since at least 2012 though
This is a bit different, BIT is an open-ended trust that derives its value solely from the price of Bitcoin; not a direct exchange of Bitcoins.