Also if I kept my coins, will the value change once bitcoin overall changes? That means if bitcoin dropped, will the amount I've invested drop as well?
Thxx BTC
Bitcoins don't grow themselves. Just like any other form of money, you need to take wise decisions and invest carefully to make them grow.
Many people day-trade Bitcoins to make profit from price volatility. Some people also trade Bitcoins for promising alt-coins and then sell when alt-coin price increases.
But trading is only for people who know what they're doing and are ready to lose their Bitcoins if market goes the other way.
If you're not sure what all this means, you better just hold on to your Bitcoins for a prolonged time and see if it rises in price dramatically.
Yes, Bitcoin price is volatile. So if you have 1 Bitcoin, you will always have 1 Bitcoin, but its value in USD (or any other fiat currency) can change dramatically over time, either way.