I have a little only because I'm trying to understand TA. So I trade small amounts based on what I think I'm seeing in the TA. I feel like it helps me learn TA better to risk a little with my ideas. So far I'm pretty even on my trading. A few positive and a few negative. Mostly I am an investor in what LTC can do.
Daytrading is getting in an position and out of it within one day. In most cases people get in and out of positions in a short time period.
Margin trading is trading with leverage. For example if you would have $100,00 but you can trade with $5000,00. In this case you are trading with borrowed money from the exchange. If your position is in a loss, the exchange can make the decision to close your position at that time to prevent further losses which will end up for you in losing money and a loss of your position.