No, I do not think that being greedy at the moment is a valid recommendation. Precisely, a few days ago Vitalik Buterin was stating that perhaps the crypto market has reached its maximum level and we will never again see cryptocurrencies shooting 1000% in a short time.
Therefore, I think that in these moments it is more advisable to be cautious than to be ambitious. Investors seem to have gradually lost interest in the speculative market of cryptos, and if they report medium-term profits they will hardly reach impressive figures as before, starting the trend towards a more stable and less volatile market.