When you are using only your discretionary income to invest in Bitcoin it means you are investing with peace of mind. Even if Bitcoin falls, your life, bills, and responsibilities stay safe and intact, so use only your Discretionary income for Bitcoin investment or accumulation.
I am sure there are beginners who buy Bitcoin for savings, not investment. So in practice, there must be beginners who understand buying Bitcoin as they would when saving fiat in a bank. They will use it when they need extra money.
I am sure that the purchase of Bitcoin is not made with a plan to hold for a certain period of time. As long as they don't need money, they can keep holding Bitcoin, but when they need money, they will sell it. The situation can be bad when they need money and the price of Bitcoin has dropped.
Although Bitcoin has hedging capabilities, still, when intending to invest in Bitcoin, we must have knowledge first.