In my defence, BTC at the top - ATH, and there is obviously going to be huge barrier here. Do you see a 100% move in BTC here, should it move above $20,000? If yes, it's good. If not (which I think will happen), you have literally exited BTC at the top which is $19700 or whatever and moved your money to coins like ripple or cardano or tron which still have 2x upside left if not more.
I see where you're coming from, but you have to recognize how little historical data we have.
In 2013, BTC blasted through the 2011 ATH like a hot knife through butter. There was barely any resistance. In contrast, in 2017 BTC struggled a lot with the 2013 ATH, correcting harshly back below it in January and March.
So before you assume jumping into alts is a good plan, you might want to make sure BTC is actually at a major top first. Even then, there is no guarantee altcoin season will kick off at that point just like March 2017. It's possible, but too early to say. I hate jumping the gun with altcoins.
Yeah, been there, see that once bitcoin goes to the top and bubble, there could be investors liquidating their bitcoin assets and then moving to alts that's why we saw ethereum and xrp making their own ath when bitcoin was already on the downward spiral.
But OP, we have to understand that we haven't reach the top yet, this is just 2016 for me, less likely that we will see bitcoin investors suddenly selling off in favor of altcoin market, not as this point as we haven't touch any ath yet.