to be honest, Im starting to consider fiat safer than cryptos for now, due to btc forking possibility. So im reducing bitcoins holding in favor of dollars - of course, I will buy them back at some point later - after the dust settles and winners are clear.
Relative confidence. Before BTC was less risky than altcoins. Now all crypto is risky. So if you want to hold crypto, now less incentive to hold BTC and no altcoins. Or as you say, you can hold less crypto. It remains to be seen if BTC crashes whether altcoins will also crash or go up. In the past when Bitcoin crashed, altcoins died. But we may have a new phenomenon now.
I think it is possible Bitcoin loiters around $800 - $1200 due to uncertainty, while some altcoins blast off. I don't think speculators want to head to the sidelines (or unanimity on shorting all crypto) just because Bitcoin has a flu. I think the perception is that the problem is with Bitcoin, not with all coins. In the past when there was a heist on an exchange of BTC, people worried about liquidation of all coins to cover liquidity needs (and reverse-FOMO effect on crypto due to bad security of crypto exchanges or what have you). Also BTC had a higher percentage of the crypto marketcap in the past.
I find it odd that you ever thought crypto was more safe than fiat. I mean ultimately it will be, but it hasn't been in terms of security and volatility.
(Not XMR because it's centralized on a sleazy exchange called Poloniex and too exotic)...
Please distinguish between reserve currency and a Wizard of the Oz façade with a tiny man pulling all the levers.
The Crypto Anti-christ says reserve currencies tickernames shall have only 3 letters and shall not begin with 'X', because a) ticker symbols are abbreviations not proper names, duh, b) it's smart to waste a letter, c) it makes your project unsuitable for minors, and d) if your token follows international naming standards, then your system isn't independent of the dying morass of democracy and government.