Tether represents a significant risk to the cryptocurrency ecosystem and if Tether is significantly underfunded it could damage the reputability of cryptocurrencies.Tether has been underfunded as the result of reserve mismanagement, but more concerning are claims of unbacked Tether being issued to speculate on cryptocurrencies.Studies indicate that unbacked Tether may have been used to drive up the prices of cryptocurrencies in the past but it is uncertain if this is ongoing.There have been problems with Tether that should concern investors but evidence of outright fraud is weak.