Maybe not ignoring the decline but how we can look for market signals that we think are a good time to enter the market. But if we can see a decline in the market, we can analyze it further to find the time to buy and vice versa. Bitcoin does have a chance to go high and reach a new ATH but we don't know when and as long as the decline occurs, it's a good time to buy bitcoin and hold it until the price goes high and sell it at a high price.
To enter the market, don't just look for signals when you should enter, you must be able to do your own analysis, at least you can basically read the market direction. If we talk about long-term investments, bitcoin does have the potential to go up and reach new ATH for the long term. Investing what you can afford to lose will be very good, But don't put everything in one basket, make a plan for investment so that the investment is safe for the long term.