There are a few ways to invest in cryptocurrency. Do Not invest if you not prepared, and can afford to lose it.
You can buy coins, like Bitcoin, Ethereum, or litecoin. Those are the big three there are more but these are the basic three and easiest to buy.
You can only really buy them at coinbase.com and gemini.com/.
Coinbase is where you buy bitcoins. Then transfer to a private wallet or go to exchange where you can trade for other coins. https://www.coinbase.com/join/593ad73a52ad010a6e80661c
They are both good, but they have their differences. I would only use a credit card with coinbase so you do an instant purchase. You will pay an extra 3 percent for this, but you get your coin right away.
Gemini.com lets you put in cash from your account and you can bid on Bitcoin at the price you want to buy for. There is big advantage to this. How ever you have to wait 5-7 days to receive it.
If you just want to buy a few coins then you can stop here. But recommend you move your coins to a private wallet, like Jaxx.
Another way you can invest is in ICO's this is very advanced and risky.
The way I recommend for beginners to start is to
buy a few coins and hold them.
Then I would take a $100 or more of Bitcoin and invest that into Control-finance: My Control-finance referral link: https://control-finance.com/?ref=stuntworks
Video explaining compound interest. It's for another company which I also have a large investment in, but, I found control-finance easier for beginners.
This video compares another company called Bitconnet.com. They do the same thing but you only get the high-interest rate at the time of investment, where with control finance you can start with 10 bucks and add little by little and watch it grow.
My Bitconnect referral Link: https://bitconnect.co/?ref=stuntworks
Both these companies have referral programs and you get a percentage for everyone you introduce into the company. So once you join and if you like the company you can invite to join you, like I'm doing as you can see my referral link above.
Once you get to the point where you making at least $50 bucks a day. I would take $20 a day that gives you $100 a week to invest in cryptocurrencies. and still, have $30 bucks to reinvest so you can get your compound interest.
Article I wrote with videos showing you how to join and how to transfer coins. https://steemit.com/bitcoin/@stuntworks/control-finance-i-just-jointed-take-a-look-and-earn-up-to-1-5-daily
Hope this helps. I am no expert, this is just what I have done. If you need more detail info then just call me.
Videos were found on youtube. You can follow them if you like when you vist them on youtube.