+1 to this.
Although i think it will be bitcoin that bursts, not altcoins.
Those buying altcoins usually have a degree of knowledge as to their value, especially with tokens.
They see the worth of the project and most are buying based on value more than on hype.
Bitcoin has been bloated by hype. People who have no understanding of this market have begun buying bitcoin and when prices start to stagger and correct a bit they will all pull out, causing a crash.
Actually its more likely altcoins burst, Bitcoin has found its place. Now this doesn't go for all altcoins but a lot of them are ahead of themselves which is also why the bubble bursts with the tech boom, companies didn't generate the expected profits and the stocks were highly overvalued because of that. A lot of altcoins are idea's and not products or services that are in full service and with a large customer base, this is why a lot of coins will crash and burn in the coming few years.
If anything people are buying altcoins based on future expectations, these expectations however might not be correct and hence those coins will crash. So if you want to be safe invest in top altcoins cause those are further developed, but thats crypto high risk, high reward or in some cases low risk high reward since you don't need a lot of money to make extraordinary profits.