I fully expect in next few years an or multiple alts to overtake BTC's price, it's clinging on just through support at the moment. So I don't think it's the best advice, just to treat BTC as something that is more worthwhile to invest in than various alts, particularly ETH seems to me a more intelligent longterm investment.
Sure this strategy really is not a wise strategy for investors because although Bitcoin is worth but that does not mean it is always stable and gives us profits on a regular basis, it still has certain ups and downs. When we are a wise investor, what we should focus on is the product that can bring us profit, regardless of whether the product is good or bad, as long as we can earn big profit, we will invest, our goal is to profit, not a blind faith to the future of the product, altcoin still has better chance than bitcoin, bitcoin is never the only option