Just technically hit my lean fire number

Single male in my late 30s, living in a vhcol city with a monthly spend of $4,500.

With the market returning what it has in the last few years my portfolio has seen incredible growth and it just hit 1.375M. Wth a 4% withdrawal rate this technically covers my monthly spend.

I have no plans to retire at the moment, because I live a semi frugal lifestyle and I would like to boost my lifestyle a bit and maybe have a family one day. I think my fire number would be 2.5M to 3M.