$Marin Software(MRIN.US)$ wtf is going on??? bought the dip, the dip went to the dive!!! 🪦 r.i.p.

$GTT Communications, Inc.(GTTN.US)$ thanks god my money is back

For beginners, placing an order sometimes can be a difficult task.
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  $AMC Entertainment(AMC.US)$   $Tesla(TSLA.US)$   $S&P 500 Index(.SPX.US)$   $SPDR S&P 500 ETF(SPY.US)$   $Nasdaq Composite Index(.IXIC.US)$

$GTT Communications Inc(GTT.US)$
does moomoo allow OTC trading? last checked it does not.

$GTT Communications Inc(GTT.US)$ what would happen to my stocks?
anyone can advise?