I have been saying, but it seems to be too hard to understand to some of traders here... (seleme and nemo to name a few)
If you are trading bitcoins, one good approach is that you normally have 100% BTC (from your invested fiat) and if something happens like big up or down then you should have a clear plan what to do, short-term future becomes a lot more easy to predict when these major spikes appear first.
Forget about how much USD you have short-term, focus only to get more BTC, because longest trend is UP UP UP.
I have noticed that my biggest loses (BTC) come when I'm holding USD and waiting too long. Don't wait that the price falls.
Make a plan and stick to it when something happens.
This will get you with more fiat and more btc.
Lol, what do you think I am doing my trading for but to get more BTC.
I will never get more BTC just looking it going up, up and up.
I'm very fine with having bad trades, if I only would have good ones I'd be filthy rich now.
And millionth time, I don't care about holding bitcoin all the time, unlike permabulls who care only about usd dollar worth of their bitcoins and who bought at single numbers or so and now talking bullshit about holding to me who bought my first coins in March or to those who bought at 1k, I care about rising quantity of Bitcoins I hold. That's why I trade and that's what I managed to do trading.
Bad trade here and there is acceptable and perfectly normal.
The only thing I have to force myself to avoid is to trade as less btc vs usd as possible. I'm not good in that and I usually make bad decisions in that pair as I'm extremely small fish in that pair and got run over too easily.