it doesnt matter if its 0.01 of a good coin or 1.0 of a coin no one uses. the unit decimal doesnt make a difference.
what makes a difference is are you buying a coin that has a community and support or not and if that coin has utility or not and if the price is at value or premium (cheap or bubble)
having bitcoin long term is a good hedge against fiat inflation.. trade altcoins only when their value is good/cheap in comparison to points ill raise below(2)
easy way to see if a coin has a community is their market price wiggle and volume compared to other coins(4)
five things to note..
ill just use btc and eth as 2 examples. but you can apply same logic to al coins
1. does the coin do anything in the real world. can you but things with it
bitcoin yes. 99.9% altcoins no
2. the value:price ratio
find out what block creation and reward mechanism a coin uses
A. if its PoW. calculate the electric of an
efficient miner per hashrate. and work out how much electric is used per block
rate electric at an
efficient electric cost of ~$0.04
also work out how many asics need to have been bought in total by everyone to achieve that hashrate
work out the cost per coin of hardware+electric. and you have a underlying
efficient cost to acquire bitcoin
compare that to the price
B. if its PoS. calculate the coins made per hour. then look at all of the 'staked validators' give them a Pc wattage usage of ~400w per validator
and calculate the electric price for that. and then calculate the per coin cost. because people are using their normal leisure/home computers instead of some specialist hardware. the hardware costs can become insignificant
compare the that to the price
3a.EG it works out BITCOIN is a > $15k* coin cost vs over $16k price
3b.EG it works out ETHEREUM is a sub $50*
T coin cost vs over $1k price
you then realise that bitcoin is at great value compared to most efficient coin acquisition cost.
you then realise that ethereum is at premium bubble compared to most efficient coin acquisition cost.
so buy the coin at great value and sell the coin at the premium
* today its about $13k to mine btc efficiently, but asics dont change at a whim. they run longterm and take the average long term which is about $15k
*T its more like $47 for combined home Pc's to stake 1 eth, but can he even less due to many are custodianised to one server 4. look at the wiggles of a market chart. if a coins wiggles(price movements) look similar to that of another coin. its means the altcoin is not producing much of its own community trade sentiments of independent price discovery. and instead is just being arbitraged by the better coin to just follow the pattern of the other coin.
no community independent market means that its not used or does not have much of a community/utility around it
EG ethereum shadow traces bitcoin sentiment like a lost sheep far too often
this means ethereums (now its PoS) is not really "trading" independantly. but being stakes where coins are locked and not traded. so what is left is just being propped up by at a speculative bubble high amount compared to efficient cost due to other markets. not its own utility/user sentiment
(worth noting ethereum changed from a PoW to a PoS. its cost dropped from ~900 to ~50. yet its price is being propped up not by its own independant community price discovery sentiment. but just being a sheep/shadow to bitcoin trading)
if their market looks like no other coins trade pattern. then it has its own independent price discovery. which could if volume is high show the coin has a community doing its own trade and utility of sentiment of price discovery.