I know that Bitcoin has become more known and trusted by many people but I still see many popular websites don't accept bitcoin like amazon. I'm only seeing bitcoin is mostly used for illicit activites or as an investment. Why Bitcoin isn't adopted yet in most legimate websites?
Bitcoin is not widely accepted everywhere and that's the major reason why we do not see each and every store accepting bitcoin. However, if you notice that bitcoin adoption has increased a lot in the past year. Institutes are ready to accept it and it is being recognized at the government level. Soon you will see Amazon and other big stores accepting bitcoin.