I guess that amount of taxes is in line with the income.
Bitcoin - I would worry about risk of crash. It has absolutely no intrinsic value. (kind of like the dollar.) "Backed by the full faith and credit of the internet"?
You need some amount of liquid funds. Usually that doesn't carry more than interest, which today is some 20% lower than inflation. Equities are volatile in their own way, but a diversified basket over time has done pretty well. Stocks and Bay Area real estate have had similar gains over many decades. I've tried my hand at picking stocks but probably did worse than a low costs index fund.
Physical gold I think will always have value. It has underperformed financials for long periods, but over all time it may have kept up with inflation. Biggest problem I see is it has to be protected and a significant amount of it would make you a significant target.
I looked up other useful metals, catalysts etc., at Kitco I think. Problem was huge spread between buy and sell if you take possession; they have to assay it. As a paper asset the transaction costs would be far lower, but then you're just a creditor of the company.
I'd like a way to ride the value of commodities. But that is mostly done with futures, or stock in mining etc. firms. Then you're subject to the risk of their leverage and other financial shenanigans.