Don't listen to these boring guys, Moderate.
You are 18.
Do it the "Mad Alfred" way.
If you are saying over $50K - I will assume you mean at least $60k.
1. Allocate $5k for a trip to the Bunny Ranch. Depending upon who your "hostess" is - it will cost you between $1,500 and $2,000/hour. Remember - you aren't paying for sex, you are paying for "the experience."
2. Join a prop firm for $5k and get it out of your system.
3. If you don't like prop trading - the $5k you paid for that certain knowledge will be well worth it. Many of us have lost that much in a day. You better be in love with the business by the time things like $5k losses happen to you.
4. If you do like it, but lost most of the 5k due to being a rookie - you can refund the account and try again. If you lose the second 5K - maybe you have to seriously consider that you may not be good at prop trading. Still worth it, in my opinion. There are very few entreprenuerial businesses that you can get into and ultimately decide (or have it decided for you) that it isn't going to work and only lose $10K.
So - for $15k - you will either get laid and learn that you don't like or are not good at prop trading. And you still have about $45k left.
OR
For $15k - you will get laid and take the first step toward (hopefully) being a successful trader.
Either way, you will get laid.
So you'll have that going for you.
Which is nice.
Good luck, kid.