The way tokens can solve these issues
The Investor is generally interested, but does not have the budget to buy a large portion of the shares
A token can help the investor to buy a small fraction of the company shares. Tokens generally allow for fractional units. This enables an investor with a lower budget to participate and buy a portion of the shares – which he otherwise could only do in an IPO.
This also solves the second problem.
The circle of Investors is limited since the entry barrier might be very high, given a certain requirement of monetary resources
By having fractional units and allowing different investors to jointly invest into the company, this lowers the entry barrier (problem 1) and also gives the startup a better stance for negotiation. More investors are qualified to invest and hence the startup has a bigger audience to chose from or negotiate with.
Previous investors want to sell a part of their position but other shareholders want to keep their shares
Especially Venture Capital firms aim for specific timeframes in which they expect their investment to bring in the expected return. Typically, the smaller the timeframe, the better. Selling the shares enables the investor to free up liquidity for other investment opportunities. With tokens, it is possible to sell a fraction of the shares at any time. This gives the investor a new level of flexibility, allowing them to rebalance their portfolio like they were never able before.
Why wait for the IPO if a startup can conduct an STO?
Instead of going public at a later stage, a Security Token Offering can already serve as a public offering much earlier. The fact that many stakeholders and cost factors are cut out with an STO, the process is more efficient and can be done much earlier than an IPO is typically done. As depicted in Assets on Blockchain, the costs of an IPO are much higher than the costs of an STO. When founders want to perform an exit of their company and they found investors who want to buy some of the shares, they can financially support the token offering which then brings access to large amounts of capital.
Summary: Why an STO makes better company exits
Performing a token offerings instead of a traditional exit makes the market more liquid: Generally speaking, more investors have access to the investment, smaller fractions can be bought and the founders or shareholders ultimately have more flexibility in exiting their company.
This is no financial or legal advice, but solely my opinion.