This is surely talking about investing with what you can afford to lose, but the way you explain it makes it look somehow different. We have said it repeatedly that guys should figure out how to invest with the little they can afford to lose, as this will help to maintain a good investment strategy to avoid selling your Bitcoin too quickly. if it happens that you are investing aggressively without a good reserved fund you will fuck up down the road due to bad financial management.
It's not about big or small fund but about how big or small your invesment fund is in comparison with your whole finance. To afford losing your investment fund, basically it should not consume too big part of your whole finance.
As if you are a degen, and bet all your finance into one investment for example Bitcoin, or worse with a shitcoin, I am very sure that after you made your entry, your mentality will become very unstable as you know deeply by your heart that if you lose in that bet, your life will be destroyed entirely when you will have no money left and face with a truly terrible bankruptcy.
If you manage to use small and acceptable discremental part of your whole finance into investment, you will easily afford to lose it, and it makes your hands stronger for holding a good asset like Bitcoin.