I put my Bitcoin in coinbase, the ERC 20 tokens I put in my IMTOKEN wallet application. Where my money depends on my investment strategy of long-term investment assets I will put them in the wallet I mentioned above. Short-term investments in just a few weeks or months I will put them on a wallet because maybe someone will pump up the price and I can sell them on time. Withdrawals and deposits will not be quick in the execution of the sell order.