Yes of course, we can achieve financial freedom with almost any asset, as long as we buy at the right time and buy enough of it. The real question is how likely is it going to be that we reach our goal. Crypto currencies made huge profits in the past and are well established now. It's a bit unrealistic to expect to make huge gains by only holding bitcoins these days. If you are looking for life changing returns you would need to go into the alt coin market. But the higher our potential returns the higher is also  our risk of losing money. The best would be to spread our money out across multiple projects and hope for the best. To achieve financial freedom we would also need to keep buying more coins with our savings. Financial independence is not something we will reach overnight, it's a long way and we need to work hard for it.