No way. MAID is extremely risky. They had years, and years to prove their project was viable. They never got to the point where you could say "okay, these guys are making something solid that will end up in a real product". A lot of investors losing patience with their delays.

If I was to spend that kind of money in crypto, I don't see any other option but Bitcoin, everything else is too much risk for that big amount.

It's pretty safe to say BTC will be worth $10,000 during the next decade, those are massive gains if you hold $500,000 worth now.