I'm waiting that some coins fall below a certain price so that I can strengthen my position in that coin.
But because I do want to be prepared I need to inject new funds into the exchange.
I do know about the transfer fees and so on, but my main question is what is the best coin to reserve this funds in.

Let's take an example:
I'm waiting on Elixir to drop below $0,55. If this happens I do want to double the amount of shares in Elix.
I'm going to trade this on Kucoin. So, I can now convert Fiat money into DGB or LTC and transfer this to one of the 2 exchanges.
On both exchanges Elixir is only traded against BTC.

Can I best convert the funds to BTC and then wait? Or are there safer coins to which I convert it in, so that it better retains its value?
Tether due to the uncertainties is not an option for me.
 
Thx!