sell at 250
buy at 220
use 50 BTC to do this.
Buying at low price and selling at high price can be profitable but. You have to keep track of btc price... I had made profit like this
And gambling isn't,a good idea,so dont go for it
Trading can be profitable but you need high amounts to make decent profit. There is a risk of losing if you do it wrong but if you do it right you can earn a lot. Gambling is even more risk than trading.
well as per my experience to earn bitcoins with less risk i am investing in altcoin coins pos only, sometime it goes up to more than 300% in few days if we choose wisely and keep eye on that to let know what is happening there than we can make safe exit from this ship otherwise it can be much risky if hold them for long time to wait for more rise of price.
Altcoins are where the biggest % change (profit) are at. Bitcoin is one of the more stable coins.