in last 2 days are very good time for trading
rate go up and down +- 100$ in 5 minute soo good profit only buy and sell btc right now
i make it in 2 hour off trading 10% profit
What you are telling was going on for past so many months, after the price increase the fluctuation in bitcoin price trading is more then 100$ , but same is that dont get stuck even if their is loss cut your position in buying.
Yes price fluctuates from last 9 years but rate increased per increase or decrease. Now it is even more than $100. As this young man said, just after few minutes we see the decrease in price. Buy and sell is now the most important and efficient way to get profit.