Hi there,
First off - big fan of Ray Dalio!
In terms of increasing your exposure, investors must keep in mind that going overweight in a particular position increases the risk profile of your portfolio. So going 10-20% in gold and crypto, is a riskier strategy. Should an investor follow this startegy? It will depend on your own individual risk profile. It is also important to note that it is very difficult for retail investors to mimic these big fund managers. They don't have the capital, nor do they have access to many of the investing tools at their disposal.
We prefer a balanced approach - typically 5% of a portfolio but can go overweight up to about 10%. I would never go to 20% - too much risk involved for me personally.
In terms of crypto - tipping one's toes in is a good strategy. I have done this myself as evidence is mounting that crypto is here to stay. I would however, ignore all but Bitcoin as the rest seem to be highly speculative. Bitcoin itself is speculative, but it is another asset class that could serve as part of broader portfolio diversification. Easing into a position and starting small is likely the best course of action considering its considerable volatility.
Mat