According to Conventional investment wisdom, the crypto market in its entirety is considered a good investment since it's all time high 5 years ago.

A quick Google search shows a forbes article that states,

According to conventional wisdom, an annual ROI of approximately 7% or greater is considered a good ROI for an investment in stocks. This is also about the average annual return of the S&P 500, accounting for inflation.

That said, back in January, 5th 2018, before the first major crash, The total MCAP was about 780 Billion.

Right now, it's hovering around 1.13 Trillion. That leaves it with annual ROI of over 7%.

From 1/5/2018 to 1/5/2023, the total MCAP would have to be around 1.093 Trillion.

So as of now 2/20/2023, it sits at 1.13. exceeding the minimum standards to be considered a good long term investment.

If you were able to invest in a long term stock that represented the entire market. I'd say go for it.

This is not investment advice, only an opinion