I think it can be possible by doing some tweaks and updates on blockchain itself or updating some old stuff handling bitcoin transactions pretty sure thay may help in making bitcoin transaction a bit faster or even be instant just like Xrp.If xrp team achieved it why not bitcoin can right
Thats a lot of work to do and to have faster transaction will affect the system drastically. There is Lightning Network already and hopes they can improve more. Overhauling the whole system is tedious and delicate, but necessity makes people to experiment and innovate try new system. I think its better to recreate the whole system, but I wonder many will support it as most people will stick to the original.