Making enough money to retire

Any realistic strategies that you have considered in order to try achieving that? Genuine question.

Working. In my 30 years employed I've managed to invest enough to make up a little. I've probably 24 years left. I think I can more than double my 401k in that time but that still won't be 1M

If crypto keeps going up there's a chance my 3k investment in it eclipses my 40yr 401k so I'm hoping for that....

Genuine answer: I buy a lotto ticket like once a week. ~100 bucks/yr seems like a decent risk/reward tradeoff once over a certain tier of income.

I may try Gambling at the end