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.
The market is always risky, but they need to be aware of investing in Bitcoin. I think investing in Bitcoin does not mean standing as a support for their later life, let's say a person cannot swim in water and he is using a life jacket for language in water and he can easily float in water because he is using a life jacket. Similarly, if he does not have much money and does not mean buying too much Bitcoin at once, he can easily store Bitcoin using the DCA method. And if he uses the DCA method, his Bitcoin holding time will also be long, because his fixed balance is not yet complete, so he should deposit more Bitcoin.