If you say based on percentage
We still early adopter
Maybe we have to wait 20 years to see most people adopt bitcoin

I was actually shocked when some one told me how many people actually own Bitcoin.
Was thinking in the range of a few million people, but it's only a few hundred thousand.
There is so much room for growth, something tells me the next few years will be huge.
Yes there is room for growth but there needs to be a reason for it to grow, eg there needs to be a reason for people to buy and use it. Right now the reason why people would use bitcoin is because it provides a lower cost way of sending money, however there is the added cost of the fact that there are no consumer protections and many scam attempts (many successful)