Mate give it a go and see what happens. If you've already got 3 years experience under your belt, then at least you have a fall back plan if it doesn't work out.
I can empathise with you, I graduated last year and just wasn't feeling the career I had chosen. So I'm currently just working part time and doing temping jobs, but mostly trading. It's been going well for me, and I'm making more money than I would in graduate level positions, but obviously trading doesn't have the security of career progression.
We're young, I think young people should try something if they enjoy it and it can make them money. If it doesn't work out, they can always start again, assuming they don't have a mortgage, family etc already.