Cryptocurrency vs. Fiat currency, which of the two do you think better? There so many differences between those two kinds of currency, but what currency do you prefer more, what currency suits your wants and needs,
I have used both crypto and fiat system to pay my monthly bills, i.e. internet, water consumption, electricity and phone, of course it's not a direct p2p because there is still a middle man in-between. As far as preference, doesn't matter, as long as I can used them as tools for my every day life.
First things first, let us define the two currencies. Cryptocurrency is all the money we have online, it is decentralized and global, it can be bitcoin, etheruem, litecoin, XRP, and many others. which is a currency that is volatile, which means it changes its price day by day, there is no static price to all of it, so it is outstanding in investing and trading in cryptocurrency and patience is what you only need here. While Fiat currencies are those physical currencies that you can touch and use to buy in real life, such as Pesos, dollars, etc. those are what we called the central government, which has a fixed price at all.
You said investing and trading, then you can kept some cryptos in your wallet and just convert it to fiat if needed. There are Bitcoin maximalist though that would rather put everything in
BTC. Nothing wrong with that, as I have said both of them can be a tool to make your life easier. So there should be no "versus" or against, it all depends on the person itself.