USD/EUR/JPY currency (either physical as bank notes and coins, or electronic) has intrinsic value because it is almost universally accepted, taxable, and backed by debt that (at least in theory) will have to be repaid at some point in time. Bitcoin proponents like to point out that bitcoins are decentralized as if that's only an advantage of the currency, but it's the fact that commonly accepted currencies are centralized, controlled and regulated that makes them trustworthy enough that people keep accepting them in exchange for goods or labor. It's called 'fiat money' for a reason. Bitcoin has none of this, and the 'value' it derives from the 'trust' people buying them is based on nothing but speculation and hype. Anyone who thinks otherwise is fooling themselves.
Disclaimer: I'm not 'anti-bitcoin', 'anti-cryptocurrency', 'pro-government' or a big fan of fiat money and how central banks are handling it. I'm just stating my observation how the bitcoin hype and echo-chamber has made people almost blind to see the risk it will some day go to zero (maybe soon)