1.) Worthy to note is the effects of an increased block size - it has a knock on effect of increasing the overall chain file size on disk, then in turn means syncing clients and downloading the chain is more of a burden for miners and decreases portability making decentralisation much harder, as less people can partake due to heightened hardware requirements for terabytes or even petabytes of storage.

2.) At a default people will intend to buy bitcoin, but actually if they don’t look closely, are new to the process or are half asleep - it’s highly possible it’s actually bitcoin cash they are purchasing and not BTC.