There is not much difference between 5 year and 1 year, because after 1 year, u'll literally earn Satoshis in a month span, unless difficulty deeps down. Moreover, selling out is a bad exit strategy as sales commission will eat up your profit most of the time as discussed here...
No, selling out would be a good exit strategy, even with these ridiculous fees. But they don't let you to sell out. To be exact, you can sell out, but you can't withdraw your btc after this.