im suggesting to pick top 50 altcoins in market cap, which is more resistant than another coins and valuable. since bitcoin it might expensive to invest, after sorting from that top 50 altcoins make some research with every developer of top 50 altcoins sure it will take many times and enegies, but it will make a good return and benefit for you if you take specific reason to why you should invest on that coin.
The most profitable coin to invest in todays market is no doubt Bitcoin. The top coin in the crypto market with the most promising profitability, liquidity, general acceptability and wide transaction ability with very low transaction cost. Besides, the current scenario is quit interesting because the monetary values of Bitcoin are low and the stability in the market is going high day by day. This is an invitation by the technology for investment.