But wouldnt it simply make more sense to have like maybe at least 15 million usd worth of bitcoin than just barely 300k usd to spend 300k usd worth of bitcoin because more money has accumulated just to kind of be on the safe side?
You're just getting everyone confused with your unclear questions. I mean like what are you trying to ask here? Bitcoin doesn't produce money from nowhere. Even during the market uptrend, you can only get profit based on what you invested and not expecting outrageous amount after investing a little amount. How much have you invested in Bitcoin that you're expecting at least 15 million dollars before you start spending? Investing and spending your money depends on your capacity not by fantasy where you think certain amount is more better to spend than certain amounts but you don't have the means.
I think OP just aims too high for what he can achieve...