Yes, if you compare the crypto market cap to say gold and silver's market cap you'll quickly realise that it is nowhere near the size of even precious metals, let alone the fiat currencies that bitcoin is supposed to be replacing.
John McAfee said that $500,000 in next 3 years is definite, i definitely wouldn't bet my own dick on live TV for that but $10k in 4 years is easy as f***. No kidding, price is already near $3000 and all we need is a triple in value. Usually a halving will bring around a 5-7x increase in bitcoin value and there is no reason to believe this isn't the case in the 2020 halving.
Honestly though i'd much rather see bitcoin have more merchants accepting it and a wider customer base, instead of its price just skyrocketing.