Gambling: In gambling if you bet your 1BTC in a boxing fight, your 1BTC , can become 2BTC in a short time. It can be also 0BTC.. In one just snap.
Next gambling: Your 2BTC can become 4BTC or 0BTC
Trading:
In trading , your 1BTC can become 1.25BTC to 3BTC in few weeks.. If your trading is bad it can be .95BTC but it will not ruin your entire investment. All moves are predictable thru news.
Positive or negative news with low impact
Fake news
Whale pumps and dumps
Price ignoring the news and going its own way (happened many times before)
You have to keep money on an a trading platform that you have no control over.