Still we have to understand the context and the moment when many thought cryptocurrencies are the way to get rich. But with time some kind of selection will happen and I think that only the best coins will survive and not so many new will appear.
In the topic of personal currencies, many mistakenly immediately recall the fact that now there are so many cryptocurrencies. It's a mistake. Many just currencies from questionable projects for the success or failure of which no one bears reputational losses. A person's personal currency will be provided by the real value of such abstraction as reputation. In order for your personal currency to have solvency, you will need to value your reputation and be able to generate or own values.