Hello everyone here... I've been reading the forums for a few months already, but I think it's the first time I'm posting.

I've been doing GPU mining (ETH, but not relevant to the question) for the last 6 months.
Now, I've been thinking about investing harder (somewhere in between $30k and $40k), so... I have a question, hope you can help me:

When it comes to GPU/ASIC mining, has it always been profitable? (or is there moments, when there's no point in mining?), personal experiences are most welcome! I'm trying to understand how risky it might be...

Thanks in advance, and sorry for my ignorance!
Kind regards,
Chris,