Every investors have their own strategy for buying Bitcoin on the long term, what works for Mr. A might not work for Mr. B. Michael Saylor, has his strategy to accumulate and hodl, he has the money to sustain it and he's not complaining. The best strategy to accumulate Bitcoin on the long term is DCA method, no matter your income so far you have a functional discretionary fund you can continue buying. My strategy of buying is DCA and it's very convenient for me, I cannot afford lump sums and I don't have to copy any money bag to buy like them.