why not?  as long as you put in a realistic ROI projection in your plan, do go ahead

IMO current realistic ROI projection is around 10 months or more, it will be shorter if there's a bull run

for my case, I also just started from scratch in April with estimated ROI of 10 months for my initial investment during that time, but I'm lucky that I've hit my ROI last month already thanks to HODLing & recent bull run before the crash
Now am slowly adding more to my tiny ops

Some of my friends wanna jump in as well, but after telling them my expected ROI, all cabut as most just wanna make a quick money in a very short term

anything in particular you found out ?
its the same with monero mining, just so called slightly better returns due to lower difficulties for now. in the end of the day you will still want at least 30 to 40 rigs running it.
its never too late to join, just dont have high expectation like its a quick money scheme. treat it like renting out property instead.
am still building rigs every month. as long as there are still pow blockchains, you will have passive income. have a good mix of cpu,gpu, asics.
maintaining balance sheet is important.