$550k to retire is doable. If you look at the CPF Life estimates for $550k on the Escalating Plan (to fight inflation). Assuming you put $550k into CPF Life at 55 years of age this year, it will give you $3340/month at age 65, $4970 at age 75 etc. That should be sufficient to cover basic expenses with some leftover. I suppose there are some assumptions needed, eg you own your home and will not outlive it, you don't have dependents after retiring etc.
$Micron Technology(MU)$ Earnings beat estimates, but after market price seems to be down, possibly due to profit taking after the amazing rise YTD. But Micron continues to be strong forward looking with a profitable 2025 expected due to HBM for AI, it should rebound and hit $150 in the next few weeks.