Another very common mistake beginners make is spending all their trading money in one go. If you find a good entry, you should buy in with a percentage of your funds (50% - 60%) and hold the rest to see whether your entry works. This way, even if a coin drops following your purchase, you can average it down by buying more at the dip. Similarly, if the uptrend continues, you can always buy more, and even though this approach reduces your profit margins, it secures your position and prevents you from being all-in on a trade that goes south.
Ethereum hit the scene with the promise of using the blockchain for more than just currencies. You could build decentralized apps on top of Ethereum and even new currencies. In the summer of 2016 I decided to buy ETH at around $9. The day after I purchased Ethereum something called the DAO hack happened and the price dropped 50%. Unlike in 2011, I didn’t need the money I invested to cover any bills. I watched my Ethereum swing between $4 and $20 for about 8 months. I wondered if I could take advantage of those swings by buying when the price was low, selling when it was high, and buying back in when the price dipped again. Though I didn’t take any action on the thought, the idea lingered in my head.

Created by Charlie Lee, a former Google engineer, Litecoin is an open-source payment network that operates on a global scale. It is not controlled by any centralized power, and it uses the “scrypt” as proof-of-work. It is similar to Bitcoin but has the advantage of offering a faster rate of generation and therefore faster transactions. This is one of the main reasons why its enthusiasts continue to invest or hold onto the coin even after finding out that its founder sold his stack.
I would also encourage you to have a secure place to keep your passwords, maybe written down in a couple of locations or stored in a password manager, just create something which works for you. Also, keep a copy of your private key for each wallet. If you lose your access and lose your keys, then you lose your coins. Don't worry; this is not necessary with every wallet, for example Coinbase and a Nano S will manage your private keys for you, this will all start to make sense once you start.
Never put all your eggs in one basket. Diversify. While the potential to earn more is increased with the amount of money you invest into a coin, the potential to lose more is also magnified. Another way to think about it is to look at the cryptocurrency market as a whole; if you believe that this is just the beginning, then more than likely the entire market cap of cryptocurrencies will increase. What are the chances that this market cap increase will be entirely driven by one coin vs. being driven by many coins? The best way to safely capture the overall growth of cryptocurrency is to diversify and reap the benefits of growth from multiple coins. Also, fun fact — Between January 2016 and January 2018, Corgicoin has increased by 60,000x, and Verge has increased by 13,000x. During the same period, Bitcoin has increased by 34x. While you would have gotten impressive gains from Bitcoin, expanding into other coins could have landed you potentially larger ones.