If by time consuming you mean the transaction period it takes to complete the transactions then I would tell tell you that there are method to fasten the transaction. There is a replace by fee method which is supported by some wallets or the double spending method. In each method you just need to increase the network fee higher for faster confirmation. This gives you the ability to control your transaction time and not the local fiat banks where you need to wait for the banks.

Cryptocurrency actually encourages diversification because people from other professions could easily venture into cryptocurrency and blockchain technology, and still keep practicing their other profession. Those who stick only to cryptocurrency trading only are even prone to make bad/panic investments since they relay on its profits only.