Wallets are a good example of this. Many cryptocurrency storage solutions — for example, hardware wallets like the Trezor and Ledger — are designed with maximum security in mind (with good reason!). But these aren’t meant to be used with day trading: the amount of time it takes to sign and confirm transactions from wallets can delay trades that you’re trying to perfectly time.
To perform cryptocurrency arbitrage, you need to find an opportunity where you can buy a cryptocurrency for less than you can sell it on another exchange (minus the fees and commission). Once you’ve found one, all you need to do is simultaneously buy Bitcoin on the lower-priced exchange and sell on the higher-priced one. It’s easy to make hundreds or even thousands of dollars in just a few seconds if you have enough funds.
Always pay attention to Bitcoin. Most altcoins (every cryptocurrency except Bitcoin) are pegged more closely to Bitcoin than Asian currencies were to the USD during the Asian Financial Crisis. If Bitcoin price pump drastically, altcoins price can go down as people try to exit altcoins to ride the BTC profits; inversely, if Bitcoin prices dump drastically, altcoin prices can go down, too, as people exit altcoins to exchange back into fiat. The best times for altcoin growth appear when Bitcoin shows organic growth or decline, or remains stagnant in price.