How do I invest $20,000 in cryptos (other than Etherium, litecoin and bitcoin) if I want to see a return of $2 million in 10 years?

You are basically looking for a 100x return on investment, this has been achieved before with even less than $20,000, if you look at the cryptocurrencies Ripple, Stratis, Antshares/NEO, Ethereum and NEM, they have all experienced pumps way over 100x.

The thing that made early investors wealthy here was mainly two things:

Low Market Capitalization

Massive Potential

They were simply undervalued and investors put their money into those coins before they had a chance to realise their potential.

To realise 100x gains you need to be able to spot undervalued cryptocurrencies, this requires a lot of research and the easiest place to begin looking is ICO’s since the people behind the project usually give you all of the information you need to know.

If you decide to invest in ICO’s I recommend sticking to industries you understand since a lot of people are now using ICO’s to line their own pockets and if you don’t know what you are doing you can easily lose your money due to investing in overvalued or useless projects. It is also important that you read the whitepapers so you know all of the details behind the coin including the purpose, use, supply, funds allocation and the roadmap.

One draw back with ICO’s is that if you do not get in early enough or you missed the ICO the coin could end being sold for anywhere from 2x - 10x its value as soon as it hits exchanges or they can end up with large market-caps if large amounts of money were raised through the crowdfund. You can still go ahead and invest in the coin after this if you really believe in it (especially if you are a long term investor) however it is best to get in early on good projects.

Another place to look is the Bitcointalk forum, you simply sign up and browse the “announcements” section where you find all of the newest cryptocurrencies, again you want to stick to industries that you understand.

Next you want to read the whitepaper, this step is very important, you need to know the technical aspects behind the coin, read it’s roadmap, find out it’s purpose or goals and find out its value proposition, once compared to the needs of the market this will help you to determine whether the coin is undervalued or not.

You can also find out the market-cap, if the coin is mine-able, what mining system it uses (PoS, PoW etc.) maximum supply and circulating supply of the coins as well as where they can be purchased from.

I would recommend you to research industries involving programming since decentralized applications are going to be very big in the cryptocurrency space (hence why Ethereum, Stratis and NEO experienced explosive growth).