Bitcoin will have failed if we have to wait until 2021 to see $500....I see $500 happening within the next couple of years.
I dunno a slow steady rise to $500 over several years could really give BTC a lot of good views.
ALTHOUGH.. just like every other thing of wealth.. once the market proves BTC is here to stay and it is steadly rising.. the media will go nuts and noobs will pour in again.
2019
BITCOIN has offered a 10% return year over year since 2015!! It's a solid investment... we'll see a boom.