So, is BTC really the ideal tool to replace banks in typical loans and mortgages, or is it only designed for big players and small-scale charity "loans" like we usually see in this forum?
Bitcoin is an alternative and not a replacement, so are other means of getting loan. They will all be alternatives to fiat and not a replacement because there is nothing that can replace fiat.
I do not think bitcoin is good for loan because someone that loan money is in dept and some people can find it hard to pay such dept back but if the price of bitcoin increases, it will become more difficult to pay. I prefer using fiat for loan but bitcoin can be good when the price is significantly high already.
Bitcoin was not created to replace bank loans or created for small scale charity loans, that is a wrong perception about bitcoin creation, bitcoin is not centralized and regulated by anyone but by itself which makes it outstanding .
Bitcoin is a digital currency which acts as a medium of exchange between two different entity to enable users buy, sell, trade without any centralized bodies,also for people to make monetary transaction over the internet It was created as a decentralized nature and strictly gives rules that contributes to it's value, and provide an alternative payment system which will operate freely on its own without any central control, not for anything like loans or charity except you decide to use your personal acquired bitcoin for that purpose, that is your wish and not Satoshi's wish .