Starting a side hustle business? For "$10k" work of effort it could lead to many times that in revenue in the future.
Even if the business fails that knowledge will often be invaluable in future jobs, projects etc.
Plus it can really help with feeling unmotivated and stuck in life.
For example are you trying to learn a new programming language (that you don't need for it), or make money.
Trying to do both a once is a sacrifice for both.
This is a great perspective. Having a strong side interest gave me a lot of happiness in times where I was set up for a lot of difficult, repetitive work over a significant stretch of time.