For relative stability, I would suggest ETH and LTC.

For potential for high gains, I'd suggest XMR and NEO. XRP and DASH are also good candidates based on recent price activity, but I have less faith in their long-term potential.

I did try, but even right on the hour change they still showed me this error "Submissions are beyond limit. Please try later."

I suggest trying again at this ViaBTC site yourself every hour, until you are able to find a time when it accepts your transaction.

It looks like the transaction still hasn't been confirmed after several hours.

I'll try submitting to https://pool.viabtc.com/tools/txaccelerator/ in 15 minutes when the limit is reset, hopefully this will help.

Like @eth9888 was pointing out, I think a lot of the time people overreact to the rise in Bitcoin price by looking at the absolute increase, instead of the percentage.

Both ETH and LTC have had dramatic increases in price recently, but there wasn't so much hype partly because it made the difference between say $500 and $700, which seems less impressive than $15,000 to $17,000.

As a percentage though, the recent price activity for Bitcoin hasn't been so unusual.

Up until now, I was thinking that any correction coming would be fairly minimal. Like a correction to 12-14k at the lowest. Mainly because of the huge support from merchants and institutional investors that's starting to build momentum behind the currency.

But the BTC transaction fees have been so high lately that it's changed my mind. Now any new users who want to sign up and send money (e.g. to pay for something with Bitcoin) are going to have transaction fees in the $10-$20 range, and a transaction that takes hours to finalize.

This is a pretty poor experience, and will probably detract from a few new investors signing up with simple sites like Coinbase hoping to get in on the trend. It's why Steam dropped support for Bitcoin transactions recently. If we see a few more major entities dropping support for Bitcoin it'll have a significant short-term impact on perception.

Based on this, I wouldn't be surprised to see a more major correction until the transaction fees (and confirmation time) improve which will help ramp up mainstream adoption again.