Should I wait for the success of El Salvador's implemetation of bitcoin before investing?
You're the only who can answer this because it depends on you. But if I were you I wont wait for bitcoin adoption's success in other countries before engaging myself. Many changes can happen that can affect the price thus its better to join the ride while you can afford to buy a portion of bitcoin. Anyway, its your own money thus you better know than anyone else the right decision to make. Have a guts to take the risk because we'll never know what is the future that lies for bitcoin.
On other hand maybe he cannot decide whether its good to buy or wait for like El Salvador to get success since its really good to see some basis before entering on something we don't know but in the case of bitcoin we already see the opportunity to buy when market is calm since mostly FOMO happened when the market starting to pump up. But since there are helpful suggestion given by respectable members here for sure newbies like him or her will surely find some decent answer towards what he ask here.