I dont have such yet to invest in bitcoin for now. As far as I can observed bitcoin is been continuosly increasing its price, so when investing it theres a need to check the movement of the coins to invest. Do some research can also help before investing.
Yeah. Each day Bitcoin's price increases making it difficult for anyone to start investing into it right away. It is said that its better late than never, but these days it wouldn't be viable to take the risk and invest large amounts of money into the digital currency.
The easiest way to get into Bitcoin nowadays, would be to buy fractions of a coin, where you could take up a small percentage of your salary for said purpose each day. In the bright side, your investment will be worth more during the long term making it the best solution towards increasing your profits.
Since Bitcoin has similar properties like Gold, you can rest assured to building a stable financial life for years to enjoy. In the case of altcoins, it is always best to make your own research about them, as many turn out to become scam or abandoned by their own developers. Only those who have a solid foundation and professional development team might be worth the investment for the long term.
Thus, when considering a strategy for altcoins, always check if the same is premined, as well as its total supply, to ensure your investment will go as planned. Just my opinion.