So.... let me start by saying I am no expert once again. Here is a little bit of investing advice. Please take it with a grain of salt, as you should any advice of this type.
I think everyone has started talking about some high risk stuff. You do not get crazy returns without some serious risk. Investing 101.
What I am talking about is a basic portfolio. A mix of stuff that spreads your risk around. I like mutual funds. A mutual fund is a balanced portfolio of investments, like stocks, that is managed by a group of investors. You buy a share of a balanced portfolio. These tend to grow in overall value of around 6% to 7% a year. Some of the good ones I just looked up are doing around 10% or better in the last 5 years. This is basic investing and pretty low risk. You can adjust your portfolio to assume more or less risk in a very controlled way.
I bought stocks in the past, as did a bunch of good friends. We all had the same experience. We made serious money on some and lost our shirts on others. At the end of the day, it balance out to a moderate return. To make that big fast money, you have to take some serious gambles. Those gambles can destroy your finances if you make a mistake. I made a fortune and then lost it all in the tech bubble. I built home equity and switched houses making good money until the housing market crash. It took almost 10 years to get back to where I was. Housing was down 35% in my area, and took 7 or 8 years to get back up. It went up 20% just in the last year and people are making crazy money again. Some say it will keep going, some say it will crash. I came out ahead, but all of that volatility averaged out to a decent return, but probably less than I would have done with a boring portfolio.
Someone else will have to give high risk advice. I wanted to point out that with a conservative portfolio of investments (of any kind) you can save a ton of money in the long term. A $200,000 car should be attainable to anyone who is willing to set money aside and take some time saving. Regardless of the goal, everyone should have a long term investment and savings plan. It costs so little each month and the long term returns are huge. It does not need to be anything fancy or sexy.
The best advice I can give is to get an advisor and start a long term investment plan.
Back to the OP. Any salary will work if you can save money long term and are willing to wait for that car.