I don't speculate from day to day.. I just watch long charts and buy what I like when it's "low", what I LIKE is what I buy.. and I like an alt based on three criteria.. 1. Will I be able to actually USE it somewhere, for something. Even if it's 'use' is merely in a service.. like "is there another site who recognizes it as useful" 2. Is the development "team" stable and working on solely on their coin, as opposed to a mirage dev-team simultaneously working on multiple crypto-coin projects.. 3. Do I think it is undervalued.
For instance:
If there's a shopping cart out there that accepts a coin +1
Do any coinpayment or exchange rate processors watch it ..and does it have volume there.
Is it well accepted ..even if it's no longer developing.. is it generally/communally accepted, and is it historically undervalued.
Right now I like BTC, ETH, XMR, DASH, DOGE & QTUM.. tho I wouldn't buy them all today.
Today I shall buy DOGE. You however should wait until tomorrow.