This idea is tentative to future edits.
The 2400-2700 sell target is a loose figure, I looked at the previous pump in 2013, went from 200 to 1200, roughly a 6x increase. Last point price levelled off was around 400-450, so 450*6 = ~2700. Not saying that's a ceiling for bitcoin, I think it will go much higher than that, along with things like gold, when inflation finally takes over. But when an asset is gaining %1000+, whatever whale is behind that price movement wants to build as cheap a position as possible, so if btc or gold or whatever is to reprice a huge deal, they'll take out all asks up to a certain point, stop buying and let the market settle so more asks build up (shake out weak hands), then buy those and move the market higher. Arguably this has been happening with bitcoin since 2012. Only after you've pumped it as much as possible is it time to sell (nasdaq/tech bubble, housing bubble, any bubble really). Bubbles or price distortion can last years, even decades.
Once bitcoin busts through it's all time high (around 1180) there's no way to tell how high it can go. It's just important to have a price to take profits, to keep you getting caught up in the hype and stay strictly profitable.
The reason I got the miner was to really teach my 9 year old about Bitcoin and have some fun doing it. She made some videos and she earns 10% of what the miner generates the until I recoup my money.
I did start buying bitcoin literally less than 2 weeks ago so I am definitely coming in late and the price is high but I have to look at where it will be in a year or two. I don't think I can go wrong buying and holding but I'm still thinking about getting another miner. Hell if John McAfee (and Bitmain) are adding 2000 S9 miners- how can I go wrong with just 2? LOL