The VLGC's were contracted out for very long periods with more or less known rates of return. Selling them, assuming GE did so for a profit, puts cash in DRYS pocket which likely will be used to further leverage the improvements in shipping rates.
There are blocking factors on the horizon. BWTS and LSO are 2 very large factors that all ships will need to deal with in the next 18 months. A pending trade war of any magnitude will cripple the cash flow for many shippers. So whether it is taking over a large amount of capacity in a down cycle or purchasing new dry bulk ships that are fully compliant, selling off the VLGC fleet makes sense.