payments through bitcoin wallets are not that difficult and we already have effective devices with better portability so implanting a chip can be very convenient but it can be achieve buy using existing devices with less risk involvement
You said we already have a effective device with better portability so why we still need this micro chips ? just because they are more smaller ? Yes they maybe but like everyone said , installing it inside our body do always have a side effect and it will not occur on early stages but you will feel it soon but this chips are not created for portability or for being convinient but these chips are invented because they want crypto users to be more safe . you will not risk you wallet in loosing or being stole but you are now going to be risking your health