Should I ask for increase?

Been working with this client for 2 years now and habang tumatagal, dumadami ang task nya Sakin. Currently:

Admin Assistant - Updating Marketing Numbers on spreadsheet, research, responding to emails, Managing our slack channel

Social Media - Creating content for his business including images and copy then scheduling sa Metricool (our SocMed scheduling tool) 1 post per day M-F

Podcast Management - Editing podcast Episodes, enhancing audio, uploading to Podcast Studio

Graphics - Anything na gusto ipa revise or ipagawa ni client na simpleng graphics sa Canva, as long as doable.

I'm also helping with their training team. I built their knowledgebase platform via Trainual and I update the data once per week. I have a good knowledge about their business Kya Sakin pinagawa.

All of that for $750/month. Output-based sya so no time tracker or anything. It's doable for me with the help of ChatGPT. Is that good trade or Nay?