Actually, it is really good to buy bitcoin because the price of bitcoin is not yet high and as of now you can buy a lot of bitcoin. On the other hand, if you buy now you can make huge amount of money in the future.
I think good to buy these days because price of bitcoin has lowered down from previous all time high. Yes when we buy now hold for long term when it reaches your goal to earned money. Time to buy and it is not late to invest.
If you are a productive investor then you may not need any suggestion but let others know about productivity in the market. Investment in the Bitcoin and Ethereum will benefit the most in long term but keep in mind that you must invest in low market and if you invest once then wait for the market value to increase.
Make your portfolio and get benefits from everywhere as you get profit in the high markets of Bitcoin and many other coins so it will payoff the most only if you invest in low market.