This is a good and challenging question for those who adopted Bitcoin early and those who just adopted it, including me. Although I've been spending Bitcoin since about 6 years ago I just started taking the investment in the coin seriously last year. This indicates that I still have over 9 years to assess myself regarding your question, yet, what I envisage is really positive.

I have been prosperous with my engagement with Bitcoin in less than a year and almost all my money that was to be wasted in my bank account was converted to Bitcoin last year for both trading and investment and the results have been "so far, so good."

In light of this, I see myself as a millionaire in $ in the next 9+ years remaining if my present success assessment is envisaged in relation to your question.