Again, I can really use ETH markets right now, I don't hold any BTC whatsoever at the moment and I won't be buying any anytime soon after all this uncertainty passes. So in terms of deposits/withdrawals for Lykke we are a little cornered right now. I don't mind using ETH or XRP for fast transactions and then convert to fiat or lkk inside the app but I just don't trust Bitcoin right now with all the delays and volatility, you can lose a lot of money just waiting for it to confirm.
It's incredible they've come to this situation, this should be a very humbling lesson for many.
When it's about Bitcoin-transaction-times it's important to have an eye on the mempool:
https://blockchain.info/de/charts/mempool-count?timespan=60days. I believe that the situation will calm down a little bit and that the price will stabilize, but the risk that there will be a hard-fork and a split has increased for sure.
Alternatives will come (ETH and over time all significant Alt's), but I don't have any details about time-estimations yet.