Technical analysis may only work to a certain extent. In the cryptocurrency markets, there are simply just so much things that could affect the prices regardless if negative or positive. Heck, even a Tweet can move prices. TA can't see that.

Based on what you said though: "According to technical analysis, the price of BTC will sure drop around $7000 soon.", you probably don't understand technical analysis. Technical analysis only helps you with the odds and with risk:reward ratios. Technical analysis doesn't help you predict.