Actually, Bitcoin is much safer than trading with altcoins if you are going to analyze and trade with futures. It would be a good place to put a position if you are short in budget because you can leverage and make profit even in slight spikes.

Altcoin in futures, for me, is risky because of the high price movement compared to Bitcoin. Usually, what I see is that there are more retail traders who do futures with Bitcoin than altcoin.
If you are one of those who trade with altcoins in futures, you are one of those risk takers, but if they are successful, the potential profit is massive.