Yeah. If we assume he didn't continue to accumulate, or spend, then that 20kBTC would be worth at least $1.4B at $70k.
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However I'm pretty sure he continued stacking, because he was handing out thousands of Bitcoin to various people in those early days.
He supposedly gave Alex Jones 10,000 BTC which got lost. So my guess is that he has WAY more than 20k BTC
Yes. You would have to be extremely generous, or have a stack so big that 10k BTC is loose change, like we share sats.
I'm fairly certain Max was a Bitcoin maxi from the get go. He saw it going to the moon when most of us weren't sure if it would even make it past the first Halving.