You don't need a crypto Ponzi example, there are legit companies like Amazon at $8 or NLX for $5. The problem is, can you name something that is cheap NOW and will be a 10 folder in less than a decade?
LTC is actually due for a decent correction so time to be cautious for 'buy-and-hold' investors. Technically, BTC and ETH are at the other end of the cycle. As stated above, BTC was overdue for a long term correction. Alt-coins were at the opposite end of the cycle. I don't think there's any need to look into it any further than that. BTC will most likely power on after Aug 1 and the alt-coins will start to pull back relatively.
What a disappointment. The symmetrical triangle broke out downward. It is almost always continuation, thus was my prediction....
Altcoins to this date are taking the biggest hit. As far as crashing BTC I doubt it'll drop substantially.