My longest wait when I holding my altcoins is 6 months
I know it is very long time but because of my patience, I gained a lot of money. I can say that holding our coins can make more profit.
What? I am not quite sure you understood the OP's question. He is asking of transfer time of transaction, not holding a coin.
Anyway, my longest wait was a little over two days. I was still a noob and that was my first transfer experience. It was with Changelly. I needed to make doge transfer and it somehow got stuck. Later, I understood the fault was from me. Ever since then transactions with them have been very smooth sailing. OP, maybe there's something from your end that didn't go in well and that could cause the delay.