Historically, governments have generated their income via an equal split between taxes and inflation. The inflation can take the form of quantitative easing whereby a central bank buys assets so that they can inject money into the economy in order to expand economic activity. The end result is that your money becomes worth less over time.
People from lower-income groups generally have less time to evaluate investment strategies, so as a result, they simply save by depositing money into a bank account. The only outcome of this cash sitting in these low interest-bearing accounts is that it is eaten by inflation. It is very difficult for some people to invest in real estate as it requires a lot of cash, management and time.
Higher-income groups tend to have less money invested in cash, so as a result, they are invested in real estate, businesses, gold or cryptocurrencies. These things have more chance of keeping pace with the current value of the currency.
Money should save your energy - but it doesn't.
Cryptocurrencies can't be inflated away, so the value is maintained in this sense. The flip side to this is that there is currently increased price volatility during its adoption phase. This is not to say that the volatility will be there forever because as it becomes more widely used, it will be harder to move the price.
Traditional money and asset ownership. Fiat is not really owned and it can be removed at the stroke of a pen by any person in the chain above you with enough power or inclination.
In the past, Banks have done a great job of turning the wild west into a civilised and organised system where you can't just rob the stagecoach anymore. Unfortunately, the banks have got top heavy and become involved in too many diverse operations that justify the employee excess. Banking and transaction fees have become bloated and unaffordable for the majority of today's banked.
In our previous economic climate, interest payments used to be a form of investment, but now they are rock bottom in many countries and even negative in some cases. These low interest rates are no match for the automated coin staking instruments that now exist across a large number of cryptocurrency platforms. They are used instead of proof of work algorithms and are another great reason to invest in cryptocurrencies.
Safety - afforded by the blockchain where irregular transactions can be identified, tracked and seized. This is possibly a double edged sword or conumdrum as many people claim that another favourable benefit is the fact that cryptocurrency allows a degree of anonimity?
In short, my vote is for cryptocurrencies. Let's make it easier to use them. Which one though? Now there is an article.