You have so many options for storing your Bitcoins which don't even involve trusting that your own internet connection is secure, let alone trusting someone els

You have so many options for storing your Bitcoins which don't even involve trusting that your own internet connection is secure, let alone trusting someone else with your Bitcoins. We need trustworthy exchanges for buying and selling BTC, but once you have BTC I am not sure why anyone would trust someone else to store them long-term.