First bull run for me and I do not have any Bitcoin yet but do want some after this bull run to hold until 2030 at least.

Is it best to take my altcoin profits in the next 6-12 months at the bull run peak and then buy Bitcoin in 2026 during the next bear market?

I see some advise to just convert my profits straight into Bitcoin but in doing that I would be buying Bitcoin at the highest prices so don't understand that.