What’s the deal with Cash Funds in trading?

I’ve been hearing a lot about Cash Funds lately and wanted to get a feel for how other traders are using them. Are they a solid choice for short-term liquidity? I’ve read that they can be a good way to keep cash handy while still earning some interest, but I’m curious about anyone’s personal experiences.

Do you find them to be reliable? Have you had any issues or surprises? I’m mainly focused on keeping my options open for when market opportunities pop up, and I want to make sure I’m not missing out by tying my cash up elsewhere. Just trying to wrap my head around how they fit into your overall trading strategy! Would love to hear your thoughts!