Bitcoin - 50$ every week for 27 years. What to expect?

So like the title says guys, I started investing in 2024 in bitcoin. First I just bought a certain sum, but now I can invest 200$ a month. My goal is to use the money as my pension and retirement funds.

I know that it’s not easy to predict the near future nor the future and what’s going to happen in 27 years. Still bitcoins seems to be like gold. And the more halving the higher the price since less bitcoin will be available.

What return would you calculate with approximately every year on average? 20% 30%. A guy I know said 60%.

Thanks