I'm trying to find a way to duplicate my BTC before the halving without incurring in high risk...
If what you’re saying is simply to double your current bitcoin holdings then I would say it is the best and less risky option. It is true that Alticoins have tendency to grow in higher percentage than bitcoin during the bull run. But the risk is higher because most of these Alticoins could just dump anytime but with bitcoin one is guaranteed a cryptocurrency coin that is a store of value and also a ROI. Also almost every increase of the entire Alticoins depends on the percentage increase of the bitcoin.
If he really wants to buy some LTC, then, don't go all in. Only sell some to buy some LTC.
Anyone can say anything to create hype for the coin they own. Check if there's strong basis why he is saying such increase.