if you increase the allocation for your buys too much, you might end up being caught half way such that other needs might come up that the remaining 50% might not be enough to solve abnd then you have no option than selling part of your holding to solve them all. everything about your investment is about doing proper planning.
I would really want to admit that you are still flowing with merit.s who pointed out that 35% of your discretionary income may not be termed very effective. I would not really tell somehow how to invest into bitcoin, but I would really point out that 35% of your discretionary income can be described as being whimpy in your investment. Reason being that before you have your discretionary income, you must have settled your expenses, so any expense that might come up outside of your expenses budget can be handled by your variances of backup funds, or your emergency fund if it is really an emergency.
50% of your discretionary income into bitcoin looks like a good deal to me, Having been building your variances of backup funds and emergency fund with the other 50% overtime should have amounted to something tangible and can handle any extra expenses that bursts out. I personally do not agree with you that putting up to 50% of your discretionary income would mean putting much pressure on yourself, especially when the other 50% isn't dedicated to your expenses, but building out your backup funds and floating cashes.