If you are looking for reliable ones, try top coins.
altcoins investments is risky, i think everyone already know about that,
my simple strategy is by buy low and sell high, and hold a good altcoins such as ethereum, eos, ada and waves my friend
then, to find an atcoins with under $1 and will go to $10 for now is very hard my friend,,
Why are you investing in EOS, ADA, ETH if altcoins are risky? Also, being lower than $1 does not mean more earnings.
Indeed, does not mean more gains, it is surely a psychological block haha ...

But I'd rather have a coin under the radar at about $ 0.01 -> $ 1 with a lot more potential than a famous coin, even if it's risky.
Because, as i said, i divided my wallet in 2 cases. Safe/ risky.
In my opinion, it is less difficult to make money with a piece very unpopular, but close to the top 100, because if it succeeded, the mass of investors would discover the coins and add them in their wallet.
For example, OMG, stellar, iota, waltonchain, lisk is already famous and many holders just hold their old altcoins and spend in others new projetcs, but if your investment move in the top 100, they will have more money available for a new project potential, also cause it have a better exposition in top100 top 50 etc..
It is always better to be in a project before the light.
But to talk about price in theory does not mean anything, you have to have, volume of trade, white paper, offer in circulation, total offer, graphics etc ...