Accept that coins can go to zero, and even good coins can lose up to 80% of their value (especially against BTC). There are many coins that didn’t make it to 2018 that were once highly valued and popular. Meanwhile, even some giants of today like ETH and XRP have seen their value in BTC prices drop to depressing levels. You should prepare for this mentally and have a strategy that factors this in. If you buy the dip in ETH from .15 down, .08 may look like an excellent price, but you have to be ready for .02. ETH holders who didn’t prepare for this had a depressing June 2017 – December 2017. Heed my warning, that new coin doesn’t have to moon twice, it can go to literal zero, and even those that will moon again… they can have long seasons of stagnation in between (where they lose value against BTC for months on end). See the Crypto Graveyard and please look at the historic charts of major alts like XRP (the gap between moons is real and some coins really don’t make it).
Backed by trusted investors and used by millions of customers globally, Coinbase is one of the most popular and well-known brokers and trading platforms in the world. The Coinbase platform makes it easy to securely buy, use, store and trade digital currency. Users can purchase bitcoins, Ether and now Litecoin from Coinbase through a digital wallet available on Android & iPhone or through trading with other users on the company’s Global Digital Asset Exchange (GDAX) subsidiary. GDAX currently operates in the US, Europe, UK, Canada, Australia, and Singapore. GDAX does not currently charge any transfer fees for moving funds between your Coinbase account and GDAX account. For now, the selection of tradable currencies will, however, depend on the country you live in. Check out the Coinbase FAQ and GDAX FAQ

Daytraders try to utilize special short-term course fluctuations. In the crypto space, this brings them profits between one and three percent. On other values they lose money. It’s almost a zero-sum game. Allegedly, good day traders average one to two percent in profit per day. We tried it and we are evidently worse than the statistical probability.
As well as buying crypto using fiat currency, a centralized exchange is somewhere you can store funds and exchange the likes of Bitcoin for other coins and tokens. Examples include Coinbase, Kraken and Binance. Although there is less risk that your funds will disappear if you forget a password or your private key, it’s important to go with reputable providers who have high security standards. That’s because there have been cases where millions of dollars have disappeared from these exchanges overnight through hacking.
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.
Don’t be greedy. No one ever lost money taking a profit. As a coin begins to grow, the greed inside us grows along with it. If a coin increases by 30%, why not consider taking profit? Even if goals are set to 40% or 50%, you should at least pull out some of the profit on the way up in case a coin doesn’t reach the goal. If you wait too long or try to get out at a higher point, you risk losing profit you already earned or even turning that profit into a loss. Get into the habit of taking profits and scouting for re-entry if you want to continue reaping potential profits.