I personal see that there are scalability difficulties with cryptocurrencies, which means they may not be able to process enormous quantities of transactions at once. This might make them difficult to utilize for routine transactions, since these transactions may take too long to process and complete.
So if you're asking yourself can I invest? Is bitcoin worth investing in? Is it smart choice to invest? Then you need to understand the challenges involved, the pros and cons, what makes it difficult to invest or not.