I routinely do $20-50g into the ones I have done my homework on like these two Tony Anish Tickers and am a FT Investor.
I like to pull my personal capital our ASAP and ride the freebies and usually pull my profits out of them over multiple years
Yes I do sell some for income as my investments are my largest income stream, I'm not really a trader but will sell/reinvest profits on the swings/corrections
If I'm actively flipping/trading a play it's usually just 5-10g in a ATM with a steady trading channel and consistent volume but that's only if something is not moving and I need to pay bills
And yes sometimes I do break my personal investing rules and let emotion dictate my trade via greed/denial and lose money but I always own my investment decisions good or bad as I have my big boy pant's on