Buy high sell low
Don't use Tether (if that's even still around) or anything like it
Periodically move profits out of the exchange into a wallet
Periodically actually cash out to dollaroos
Understand the what and why of the word "portfolio"
Any exchange that allows you to go short on coins like ether is ripping off users that go long, so use coins like that when you need to go short and never go long on them on that exchange.
Don't let numbers, red or green, emotionally affect you.
Don't read the fluff people write to hype up their coin or crypto in general.
Actually, do read the fluff, but now keep in mind they're probably taking the time to write it to fight the imminent collapse of that coin. If everything is going well they're either too busy working or too busy enjoying their success to waste time writing articles.
Get a good RSS ticker that updates quickly.
>mfw having someone do daytrading for me under these very conditions
Tell your client the market is low right now and they should buy. Point him to a logarithmic graph if you want to back up your claim.