Can you really be sure you will profit unless you have insider info?
Not at all. Trading with bitcoin requires you to follow the price flow, current events that might change the price and also a little luck.
Also applicable to altcoins as well.
Well, you know, bitcoin et al. is just like money invested in stock market, you can never really pinpoint the exact trend of its rise and fall. But yeah, current events can greatly affect the trading. Remember when china banned the use of bitcoin? Its price went down for how many days. The more people invest in bitcoin, the market gets stronger. So it's not all about guessing but for me it is more of educated play.
