Cryptocurrency exchanges are websites where you can buy, sell or exchange cryptocurrencies for other digital currency or traditional currency like US dollars or Euro. For those that want to trade professionally and have access to fancy trading tools, you will likely need to use an exchange that requires you to verify your ID and open an account. If you just want to make the occasional, straightforward trade, there are also platforms that you can use that do not require an account.
I prefer to trade on decentralized exchanges. For myself, I made a choice in the form of ethnermium.сom. They have a huge number of coins. There are no minimum restrictions on trade and fees are so insignificant that you will not notice them. I also think the advantage of the easy creation of a wallet like MeW and easy integration with metamasks and a high level of security
For example, if it was thought that things were getting very frothy, and most of the people who were getting in were just gamblers who were buying on credit, then that might be the time to cut loose using that as your signal rather than using a technical one. On the other side, if you have cryptocurrency that is just hammered to the floor with everyone thinking it’s dead and everyone’s out of it, one can use this opportunity to make a few purchases as a long-term investment and wait for the upturn.
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.