You are talking for 100 years from now. There will not be any bitcoin hobbyists around if a better coin is being introduced meanwhile.
Yeah as I understand the last coin will be made in 2040, and sure there will be some hobbyists out there, there are still people using the commodore 64 and playing ultima online.
2140 not 2040. (Actually it will be earlier than 2140 but anyway). People that are using commodore 64 and play ultima online were alive when commodore 64 was actually something usefull. I don't think that anyone that is younger than 30 years old cares about commodore 64.