Can you say the same thing if you bought at the top? Pretty sure you won't be able to do that. Any cryptocurrency is a high risk investment, in fact it was not intended as an investment in the first place, but because the nature of Bitcoin (and speculations for other cryptocurrencies) many people started to buy them as an investment.

I think Justin Sun has a point there, though I don't really believe in this guy. However, if he mean by not a business opportunity is that Bitcoin is not suitable for business as a medium of payment, then we should disagree. So far, he's very successful on hyping all of his project. That's the power of marketing + if there's too much speculators and moon boys in crypto.