IMO.. avoiding the influence of Bitcoin prices compared to FIAT will help you overcome doubts. This will have a positive impact on your emotions, preventing you from being constantly affected by price fluctuations. The main focus should be on accumulating BTC until you reach your BTC goal amount. Buying it consistently will accumulate bit by bit, turning into something significant in the future.
I think this is important if we want to get the maximum return on our investment. After reaching a certain level I stop buying and just accumulate savings, if the price falls below my level again I will start buying again, if not then I will wait for my selling targets and wait for a bear market. I consider this strategy to be the most acceptable for achieving good results. You can set a goal as you indicated, but it can be achieved with a high average price and then the profit will be significantly lower.