Smartcash is a good trade. Congratulations for discovering it. But beware of investing money even with 15% interest per month. Such an offer is always a Ponzi scheme as they do not earn any money by doing real business. They only sell token and have good ideas. Cardano also had a big move in the last weeks but they only have a theory which may be wrong. At the moment we need practical solutions and no theories. Practical solutions like Steem and its coins. But sbd will never see a price of 50 Dollars. Maybe perhaps 10 Dollars in some weeks. But today we have 5,46 Dollar per sbd and the market is today not growing very much.