There will always be someone who wants to sell off their Bitcoin for some useless paper cash. Not all of us here for long term vising many investors just wants to consider btc as a speculative assets. If it's not true then why BTC price seeing heavy resistance in 32k level. Someone is booking their profits there in fiat currency. Using BTC to pay service and goods is not likely to happens very soon. Peoples are still not very cautious perhaps that is the reason we see thousands of altcoin having billions of marketcap.