The future is uncertain to all of us. Yup, there is a possibility that the crypto currency will be the future of money but that will be tough to achieved. There will be trials on courts, debates and different perspective of people worldwide. It will be against all odd ( bankers, central banks will be a problem not to mention the government power and the media that is being manipulated by the government ).
If were talking about getting rich when we have many, the early investors are already rich I think, because bitcoin is cheap that time and I think there are people who are bitcoin holders that bought a lot of btc way back 2009 or 2010 that have a lot of fiat now. BTC is pricey nowadays only rich people can buy a lot of btc nowadays, and you wont get rich even if you invest now unless btc price will double or triple in the near future. ( Like I said this will be a deadly battle before btc become the future of money )
Best moment of buying bitcoins was when it's price was cents, imagine which bought bitcoins that time, now his/her profit is x1000 and higher. Buying bitcoins from the moment it was created would be the smartest decision but many people didn't think such future of bitcoin. I was looking for old posts and I laugh when I see how people were spending 100btc in something cheap.
Bitcoin can't change paper money, also for fast buy confirmations are bad. If that issues will be fixed, maybe it will have chanse to take leader position in online buy/sell.