Start a Holding Company?
If you are trying to invest in closely held / private companies (things that don't trade on the stock market), you will run into a variety of regulatory problems. For various reasons, most private companies only raise funds with accredited investors. To be an accredited investor you basically have to have $1,000,000 in net worth - NOT including your primary residence, OR you have to make over $200,000 a year for the last two years and expect to keep making that much. This is a class distinction the Federal government created, you will see different but similar wealth and investment classes worldwide. So your best most organized opportunities are left out, unless you do qualify as an accredited investor. There are tons of other companies, things you will find locally, that will let you invest in their smaller time operations. (Think like a local yoga studio looking for $20,000 and willing to split the profits with you). But the problem here is lack of accountability, where partners skip town or just stop answering your calls, and the legal remedies cost you more than your claim. That being said there are people that provide capital to smaller publicly traded companies on the bulletin boards and pink sheets. They have opportunities do much better than the actual stock market investors in these companies, because you can negotiate contracts that let you cash out in their inevitable financing death spirals with very little risk to you. You can do these things as an individual or as a holding company, but the holding company will limit your liability to the amount your holding company invested, instead of your personal assets, in case your financing starts to incur liability with the company.