It is a good decision if you invest 60% of your savings in bitcoin, in other words you have 100% of your savings and of course you have managed your needs well so that you have savings and risk funds or emergency funds for your needs in the next few months. . 40% of savings if you feel enough with it to cover unexpected budgets beyond the budget needs that you have made before.
Maybe I'm trying to understand that 60% is from savings not from the income you have, so I totally agree about investing 60% of savings.
I don't agree with your question, maybe 40% for investment is realistic for long term investment and 60% for allocation for priority needs and some for unexpected urgent needs, if you increase more funds for investment then something you have to cut crypto investment costs for priority needs because you do not have other funds if there is an urgent need for medical expenses. So a wise investor will never allocate investment higher than priority needs, moreover crypto investment is also a high risk unless you are willing to hold it for the next few years.
If you pay attention to what I'm saying, maybe you won't be wrong, I mean 60%, if all budgets have been made, both emergency funds, health and basic and unexpected needs are outside of investment savings funds, then 100% of savings funds are free money without being tied to anything that is saved, so using 60% of the funds to get into bitcoin is the right decision and the remaining 40% of the free savings fund is a fund to cover if there are expenses that are more than what has been arranged in budget.
I'm talking crypto, namely bitcoin, not altcoins, so of course the focus is on the long term, yes, at least for the present moment, it's more or less a year and a half away.