$10k is enough amount for starting any business. If you are creative in investment then must you'll able to make profit. Now I'll describe about two methods.
First, create a sites and develop it. Must your targeted traffics will be above $40000 in your site. If you don't have personal worker then you need to hire at least 15 people for first time. Always try to generate active traffics. If you can generate 5% active traffics that would be enough task. 5% active traffics means you'll found above 2000 active traffics in your account.
If you are able to do it then must you'll found few guys who are interested to sell your product in your site. For first time you'll take $10 per selling thread. When your site will become highly reputed then you'll take above $25 per selling thread. Please don't permit traffics to post any irrelevant links or threads. I hardly believe that if you are able to do it then you'll be millionaire within 3 years. Just you have to invest few time for these project. If you are interested to follow these methods then please let me know. I'll give you more tips to handle these site.
Second way, Secondly I advised you to continue a freelancing site. Just you have to build that and you need to carry on must your site become reputed like upwork or freelaner.com. First they didn't invested such amount. They started from a simple platform and day by day they developed their sites.
If you have enough interest on the purpose then first hire a developer, 10 freelaner and 3 moderator. Then create your site with the help of the developer and permit him to develop these site. Take 2 month for these purpose. After that time the freelancer's task will be marketing your site and generate more traffics, moderator's task will be moderate your site and you'll be the owner and power moderator. Please handle all of things safely and carefully. Permit the freelancer to continue at least 100 signature links in 100 reputed sites where clients and freelancers are available. At first time give opportunity to work without any charge. When you'll able to generate above 1000 clients and 20000 freelancers then fixed a charge each transaction.
I hardly believe that both of these are excellent ways to invest 10k dollars. If you have any question and if you needed more information then please response to these thread. Must I'll comeback to response you.
Wish your good day.