Before an investor begins to accumulate Bitcoin for the long term, it's important to establish a savings fund and an emergency fund. These funds will help maintain a stable investment portfolio and prevent the need to sell investments prematurely, especially when they are still in the early stages. Having reserve and emergency funds is crucial for Bitcoin investments, as they will allow you to address your needs and any unforeseen circumstances. This way, you can continue to accumulate Bitcoin over time using the DCA strategy, which is popular among investors.
Just invest what you can afford to invest monthly or weekly and don't think about it too much.
The main thing is to not do the lump sum buys if you have some risks attached due to the need to cash out earlier than needed.