Bitcoin isn't an investment, it's a currency.
The most of people who are hoarding BTC think it's an investment and are dreaming becoming millionaire one day!
Right, they are converting from one currency to another hoping that they will be able to convert back to the original currency at a much better exchange rate. That's not investing, that's speculating.
If those people understood how the fiat scam works, and believed in Bitcoin, they wouldn't be interested in trying to accumulate fiat currencies. They would be trying to escape from fiat currencies.