Lindy effect for Bitcoin is certainly favorable. It can probably outlast most crypto's out there.
When the alt's rise and FOMO sets in, it always carries the risk of making an investor a bag holder. Since most of my investment is in altcoins, I know this well. While BTC and ETH fell around 60-70% from ATH, the altcoins have fallen hundreds and even thousands of percent.
When you mention the fact that a lot 'big guys' have turned the alt coin market into a game for making more fiat, it makes me wonder why more people are not speaking about it because it is certainly. By people I mean prominent names in the cryptosphere.