This conversation has gone whack.
If you really want to stay true to anti-capitalist ideals to the extent that you are willing to impoverish yourself, the only answer is to use your money to further those ideals. No personal stake in any capital, including digital capital. No rentier profit from debt or property. Instead, money would have to be used only for community ventures. If you want to go down that route, I admire and salute you but I’m not willing to follow you. I’m too cynical about the ability of my personal actions to be more than a single droplet in the Mississippi that wants to move against the current. I’m afraid that I want to protect myself.
So assuming that (a) you are fortunate enough to have surplus income to invest; and (b) you want a retirement that isn’t dependent on society having first thrown off the twin yokes of capitalism and neoliberalism, the question becomes: what’s your best bet for investment?
In this case, I would say that your best bet has to be the one in which your ability to retire is tied to the thing that means you need the pension in the first place, namely the power structures of capitalism and neoliberalism. Capital as a whole is making profits. Ever more profit, in fact. It might someday fail to do so, at which point we’re in that world in which something has to replace capitalism — hooray. In the meantime, having a stake in the totality of the pot of capital is your best bet. And that means owning as diversified a share profile as possible/reasonable*. Those shares will pay you the profit being made by capital, which is the very income stream you can use to live on. And the income stream is exactly as reliable as the power of capital to produce its profit.
Do it that way and the actual valuation of the shares is, pragmatically, irrelevant, because you never need to sell them. But for what it’s worth, I have a share portfolio and its current value is about 5-7% less than its all time peak value (albeit actually still more than it was this time last year). Being 7% less than peak doesn’t make me feel great, even if it isn’t relevant. But given that this represents a point in time during one of the biggest financial crises the world has been through, it’s not exactly disastrous. By comparison, the current drop from peak cryptocurrency valuation is an order of magnitude higher AND, more importantly, the only way to realise value from that cryptocurrency is to sell it. It’s not providing an income. So the 70% drop is a real hit, not just a paper loss. If I were relying on selling cryptocurrency to buy things, I would genuinely be 70% poorer.
And this idea that’s since all these companies will be using blockchain in the future so you should buy cryptocurrency now — this is arse-forwards. The fact that, in the end, capital adopts useful technologies is exactly why you might as well just hold a diversified stake in capital. If the idea is good, it will become part of what you own over time anyway. If it isn’t good, there’s no harm.
So, in brief, if you can afford to invest for the long term then just hold a diversified portfolio of income-generating shares. If you need liquidity in the short term, hold cash. Don’t hold crypto at all unless you want to buy a form of lottery ticket, rather than invest.
* “reasonable” in this case reflects the need to have high-income shares as a priority, rather than necessarily just a pure index tracker