While Dogecoin may be your primary interest, you can invest in countless cryptocurrencies in a self-directed IRA. Cryptocurrency IRAs are available to save for retirement with tax advantages. These cryptocurrency IRAs (also known as “Bitcoin IRAs”) can be opened with several account providers. But if you already have a Roth IRA, you most likely won't be able to invest cryptocurrency in it.
Of course, Dogecoin can stay for a while at the expense of social media and influencers, but it's not a solid long-term investment. Instead of investing in Dogecoin, it might be better to look for other digital assets for your retirement account.