THE best and accurate WHERE to invest BTC is to look out for alt with low market cap, good and proactive team and promising product to stand in terms of heat (during the dip). they will always give you huge profit and your btc investment is highly enhanced. my little pinch of salt to add.
The first thing we must understand is that altcoin is more fluctuating than bitcoin, it is common for altcoin to rise and fall hundreds or even thousands of percent a day, which is why we have to be alert and make good analysis.
It's not fluctuating that hard anymore. It become more calm eventually. I think this is why people understood the market better after all the experience.