Is $600,000 enough to retire at 65?

I'm curious to know if $600,000 is truly sufficient to retire comfortably at the age of 65. With the ever-changing landscape of finance and investments, including the rise of cryptocurrencies and other alternative assets, is this amount still considered adequate to maintain a stable lifestyle and cover potential healthcare expenses in retirement? It seems like a substantial sum, but is it enough to withstand inflation and other economic uncertainties in the long run? Additionally, what strategies or considerations should one take into account when planning for retirement with this amount of savings?