Some country are now accepting bitcoin as currency and the billionaires is now hoarding thousands of Bitcoin. Should I wait for the success of El Salvador's implemetation of bitcoin before investing?
I think if they become a more successful country by accepting bitcoin, others will implement too. There will be more investors and the bitcoin will be pump again?
I just hope I'm not wrong this time.

Bitcoin has been successful ever since it gained value. Look at how far it has become from almost no value at all.
If you'll have the same mindset in the coming years, you'll never probably invest a single cent because you always think Bitcoin is on it's peak.
Also, just like everyone said, El Salvador's success in accepting Bitcoin doesn't dictate the price of Bitcoin.