One of my favorite pipeline stocks to buy right now is Energy Transfer (ET 1.47%), and investors can pick up the master limited partnership (MLP) on sale, with shares trading down nearly 20% from their high as of this writing. In fact, the stock is one of my largest holdings.Here's why Energy Transfer is a great stock to buy and hold for the long term.High yield with growing growth opportunitiesEnergy Transfer has built one of the largest integrated midstream systems in the U.S., handling the transport, sto ...